Renesas Computer Hardware M34502T MCU User Guide

M34502T-MCU

MCU Board for PC4504 Emulator System

User's Manual

Rev.2.00

July 1, 2004

REJ10J0273-0200Z

Contents

Preface ....................................................................................................................................4

1. Precautions for Safety.........................................................................................................5

1.1 Safety Symbols and Meanings ..............................................................................5

2. Handling Precautions..........................................................................................................9

3. Contents of the Package ...................................................................................................11

3.1 Package Components of the M34502T-MCU.....................................................11

3.2 Other Necessary Products ...................................................................................11

4. M34502T-MCU................................................................................................................13

4.1 Outline .................................................................................................................13

4.2 Specifications ......................................................................................................14

4.3 Switches ..............................................................................................................15

4.4 Check Pins...........................................................................................................16

4.5 Connectors...........................................................................................................16

4.6 Connecting to the Target System ........................................................................19

4.7 LED .....................................................................................................................23

5. Precautions to Be Taken When Debugging......................................................................25

5.1 Reset ....................................................................................................................25

5.2 System Clock ......................................................................................................25

5.3 Real-time Capability of Timer ............................................................................25

5.4 Watchdog Timer..................................................................................................26

5.5 Port I/O Timing ...................................................................................................26

5.6 Port I/O Characteristics .......................................................................................27

5.7 Pullup Transistor .................................................................................................27

5.8 RAM Backup Mode ............................................................................................28

5.9 Program Execution (G, GB)................................................................................29

5.10 External Trigger Signal .....................................................................................31

5.11 Other Precautions ..............................................................................................31

6. Connection Circuit Diagram of the M34502T-MCU .......................................................33

7. External Dimensions of the Pitch Converter Board .........................................................35

7.1 M34501T-PTC ....................................................................................................35

Appendix A. How to Request for Repair .............................................................................36

( 3 / 38 )

Preface

This user's manual describes the specifications of the M34502T-MCU emulator board for Renesas

4501, 4502, 4506, 4507 and 4580 Groups of 4-bit single-chip MCUs. The M34502T-MCU is an

MCU board for the PC4504 system used by installing on the PC4504 emulator main unit. For

emulator main unit PC4504 and emulator debugger M3T-PD45, refer to each user's manual.

To use the product properly

Precautions for Safety

• In both this User's Manual and on the product itself, several icons are used to insure

proper handling of this product and also to prevent injuries to you or other persons,

or damage to your properties.

• The icons' graphic images and meanings are given in "Chapter 1. Precautions for

Safety". Be sure to read this chapter before using the product.

( 4 / 38 )

1. Precautions for Safety

In both the user's manual and on the product itself, several icons are used to insure proper handling

of this product and also to prevent injuries to you or other persons, or damage to your properties.

This chapter describes the precautions which should be taken in order to use this product safely and

properly. Be sure to read this chapter before using this product.

1.1 Safety Symbols and Meanings

If the requirements shown in the "WARNING"

sentences are ignored, the equipment may

cause serious personal injury or death.

WARNING

If the requirements shown in the "CAUTION"

sentences are ignored, the equipment may

malfunction.

CAUTION

It means important information on using this

product.

IMPORTANT

In addition to the three above, the following are also used as appropriate.

means WARNING or CAUTION.

Example:

CAUTION AGAINST AN ELECTRIC SHOCK

means PROHIBITION.

Example:

DISASSEMBLY PROHIBITED

means A FORCIBLE ACTION.

Example:

UNPLUG THE POWER CABLE FROM THE RECEPTACLE.

The following pages describe the symbols "WARNING", "CAUTION", and "IMPORTANT".

( 5 / 38 )

WARNING

Warning for Installation:

• Do not set this product in water or areas of high humidity. Spilling water or some other liquid into

the main unit can cause an unrepairable damage.

Warning for Use Environment:

• This equipment is to be used in an environment with a maximum ambient temperature of 35°C. Care

should be taken that this temperature is not exceeded.

CAUTION

Cautions to Be Taken for This Product:

• Do not disassemble or modify this product. Disassembling or modifying this product can cause

damage.

• Use caution when handling the main unit. Be careful not to apply a mechanical shock.

• Do not pull the emulator by the probe (60-wire half-pitch cable or 26-wire normal-pitch cable).

• Do not use inch-size screws for this equipment. The screws used in this equipment are all ISO

(meter-size) type screws. When replacing screws, use same type screws as equipped before.

( 6 / 38 )

IMPORTANT

Notes on Differences between an Actual MCU and the Emulator:

• Emulator operation differs from emulation of a mask MCU, as listed below. For details refer

to "5. Precautions to Be Taken When Debugging".

(1) Reset condition

(2) Initial values of internal resource data at power-on

(3) Internal ROM and RAM capacities, etc.

(4) Electrical characteristics

(5) Operation in the RAM backup mode

(6) Operation of the watchdog timer function

(7) Port I/O Timing

• Therefore, always be sure to evaluate your system with an evaluation MCU (OTP version). Also,

be sure to perform board-mounted evaluation with an ES (Engineering Sample) version MCU to

make final confirmation of device operation before starting mask production.

Note on the Target System:

• Make sure that the target's supply voltage specification is +3.0 V or +5.0 V. Therefore the target's

supply voltage should be in the range of +3.0 V ±10% or +5.0 V ±10%.

Notes on Connecting the Target System:

• When connecting the emulator probe, be careful to the wrong connection.

• When connecting the emulator probe, be careful to a warp of the cable. The warp may cause

breaking the wire.

( 7 / 38 )

MEMO

( 8 / 38 )

2. Handling Precautions

When using the M34502T-MCU board, pay attention to the following:

(1) About the emulator

To use the M34502T-MCU board, install it on the PC4504 emulator main unit.

(2) About the MCU board installation

Before installing (and removing) the MCU board, always be sure to power off the PC4504

emulator main unit and unplug its power cord from the outlet. For details on how to install and

remove the MCU board, see "Chapter 2. Setup" in the PC4504 System User's Manual.

(3) Emulator debugger (M3T-PD45)

When using the M34502T-MCU board to debug your program, you need emulator debugger

M3T-PD45 (sold separately). Be sure to use the data file for 4501, 4502 or 4580 Group included

with emulator debugger M3T-PD45.

(4) Registers that can be operated from M3T-PD45

Tables 2.1 and 2.2 list the registers that can be operated from M3T-PD45.

Table 2.1 Registers that can be operated for 4501, 4502, 4506 and 4507 Group MCUs

Reference

Yes

Modification

Yes

Reference Modification

Yes

PU0

PU1

PU2

Yes

( 9 / 38 )

Table 2.2 Registers that can be operated for 4580 Group MCUs

Reference

Modification

Yes

Reference Modification

Yes

PU0

PU1

PU2

Yes

( 10 / 38 )

3. Contents of the Package

3.1 Package Components of the M34502T-MCU

Table 3.1 shows the contents of the M34502T-MCU package. When unpacking your M34502T-

MCU package, check to see that all of these components are included.

Table 3.1 Contents of the M34502T-MCU

Item

Product name

Quantity

M34502T-MCU

60-wire half-pitch cable (40 cm)

26-wire normal-pitch cable (10 cm)

2-wire cable for external trigger signal (50 cm)

PCA4029 pitch converter board

OSC-2 oscillator circuit board (J1 connector mounted)

M34501T-PTC pitch converter board

M34502T-MCU user's manual (this manual)

*1 The M34502T-MCU has an oscillator circuit board OSC-2 (for 4.19 MHz) that is incorporated

when shipped from the factory. In addition, it comes with an oscillator circuit board OSC-2, with

only a connector J1 mounted.

*2 Keep the packaging carton and cushion material of the M34502T-MCU to transport it for repair

or for other purposes in the future.

*3 If you find any item missing or faulty, or any suggestion, contact your local distributor.

3.2 Other Necessary Products

To bring forward programs development on the 4501, 4502, 4506, 4507 and 4580 Group of 4-bit

MCUs, the products given below are necessary in addition to those contained in the package above.

Get them separately to be ready when necessary.

(1) Emulator main unit:

(2) Emulator debugger:

(3) Programming adapter:

PC4504

M3T-PD45

MS4238-20F

(for serial programming 4501, 4506 and 4580 Group MCUs)

MS4502-24F

(for serial programming 4502 and 4507 Group MCUs)

(4) Serial programmer:

MSP-II or EFP-I

The programming adapters and the serial programmers listed above are products of Suisei Electronics

System Co., Ltd. For details on products, contact Suisei Electronics System Co., Ltd.

http://www.suisei.co.jp/index_e.htm

( 11 / 38 )

MEMO

( 12 / 38 )

4. M34502T-MCU

4.1 Outline

By using with the PC4504 emulator main unit, the M34502T-MCU can make up an emulator system

which can be operated by a personal computer. Figure 4.1 shows the development support system

configuration for 4502 and 4507 Group MCUs. And Figure 4.2 shows the development support

system configuration for 4501, 4506 and 4580 Groups.

Figure 4.1 Development support system configuration for 4502 and 4507 Group MCUs

Figure 4.2 Development support system configuration for 4501, 4506 and 4580 Group MCUs

*1 Use the M34501T-PTC pitch converter board for 20SDIP.

For details on the connections above, see "4.6 Connecting to the Target System" (page 19).

( 13 / 38 )

4.2 Specifications

Table 4.1 lists specifications of the M34502T-MCU.

Table 4.1 M34502T-MCU specifications

Applicable MCUs

4501 Group

4502 Group

4506 Group

4507 Group

4580 Group

Evaluation MCU

M34502E4FP (mounted)

Maximum operating

clock frequency

System clock: 4.19 MHz (with OSC-2 for 4.19 MHz)*¹

Default mode

4.4 MHz

Low-speed mode

3 V

Medium-speed mode 3.0 MHz

High-speed mode

Default mode

1.5 MHz

4.4 MHz

Low-speed mode

Medium-speed mode

High-speed mode

5 V

Target system voltage 3 V or 5 V

Power supply

Port emulation

Supplied by the PC4504's internal power supply (+5 V, +12 V)

Port

Output type

Direction

Device used

D⁰- D5

Input/output

N-channel

open drain

Input: 74HC4050

Output: 74LS06

P00 - P03

P10 - P13

P20, P21

Input/output: 74HC4066

Board dimensions

233 (D) x 135 (W) x 1.6 (H) mm

Operating temperature

Product configuration

5 to 35°C (no dew)

• M34502T-MCU

• 60-wire half-pitch cable

• 26-wire normal-pitch cable

• External trigger cable

• PCA4029

• OSC-2 (for changing frequencies)

• M34501T-PTC

*1 The M34502T-MCU has an oscillator circuit board OSC-2 (for 4.19 MHz) that is incorporated

when shipped from the factory. In addition, it comes with an oscillator circuit board OSC-2, with

only a connector J1 mounted.

And the M34502T-MCU operates in the default mode (instruction-clock: f (X^IN)/8) immediately

after a RESET is released.

( 14 / 38 )

4.3 Switches

Figure 4.3 shows the positions of switches of the M34502T-MCU. Table 4.2 lists the functions of the

switches and their factory-settings.

Figure 4.3 Positions of switches

Table 4.2 Functions of switches

Switch

Label

Setting

Description

Factory-setting

Does not output the V^DDof the M34502T-

MCU to the target system.

OFF

SW1

Outputs the V^DDof the M34502T-MCU to

the target system.

OFF

ROMSIZE

5 V

OFF

5 V

Set the MCU’s ROM size.

• Set "2" for M2

• Set "4" for M4

SW2

SW3

Set to "4"

5 V

Operates the evaluation MCU on the

M34502T-MCU at +5 V.

3 V

5 V

Operates the evaluation MCU on the

M34502T-MCU at +3 V.

3 V

501/502

The M34502T-MCU operates for 4501,

4502, 4506 and 4507 Groups.

501/502

580

501/502

SW4

The M34502T-MCU operates for 4580

Group.

580

( 15 / 38 )

4.4 Check Pins

The M34502T-MCU has check pins listed in Table 4.3.

Table 4.3 Check pins

Pins

Function

V^DD

Outputs 3 V or 5 V by MCU voltage according to the setting of SW3.

Ground

GND

XIN

Outputs an instruction clock (depending on the operating mode) of the MCU.

"L" when running user program, "H" when stopping execution.

RUN/STOP

"H" when decoding WRST instruction, possible to monitor the clear cycle of the

watchdog timer flag by a waveform.

WRST

4.5 Connectors

Table 4.4 lists the functions of the connectors, and Figure 4.4 shows the positions of connectors.

Table 4.4 Connectors

Connector

Function

Connects the evaluation MCU bus.

Connects the monitor CPU bus.

Connects the target system (60-pin).

Connects the external trigger signal (2-pin).

Connects the oscillator circuit board (4-pin).

Figure 4.4 Positions of the connectors

( 16 / 38 )

(1) Connector J3

Table 4.5 lists the pin assignments of the 60-wire half-pitch connector (J3) for connecting the

PCA4029. And Figure 4.5 shows the connector J3 pin layout.

Table 4.5 Pin assignments of the 60-wire half-pitch connector (J3) for connecting the PCA4029

Line B

Signal

GND

Line C

Signal

EV^DD

Line D

Signal

Line A

Signal

GND

Pin No.

I/O

P3⁰/AIN2

GND

P31/AIN3

EP00

EP01

EP02

EP03

EP10

EP11

I/O

GND

VSS

XIN

XOUT

CNVSS

ERESET

EP2¹/AIN1

EP20/AIN0

ED5

I/O

EP12/CNTR I/O

I/O 10

I/O 11

I/O 12

EP1³/INT

ED⁰

I/O

ED4

ED3

ED1

ED2

In the I/O column "I" denotes "Input"; "O" denotes "Output"; "I/O" denotes "Input/output"; "-"

denotes "Not connected".

Figure 4.5 Connector J3 pin layout

( 17 / 38 )

(2) Connector J4

For the connector J4 for the external trigger signal, use the 2-wire external trigger signal cable

included with your M34502T-MCU. Connect the black clip of the external trigger cable to GND,

and use the white clip for an external trigger signal input. Use the external trigger signal as an

external trigger break or an event input of the trace point by the external trigger. Table 4.6 lists

the pin assignments of the connector J4.

Table 4.6 Pin assignments of the connector J4

Pin No.

Signal

TRIG

GND

Function

External trigger signal input

GND

(3) Connector J6

The connector J6 is a connector used to connect an oscillator circuit board OSC-2. Table 4.7 lists

the pin assignments of the connector J6. Figure 4.6 shows the pin layout of the connector J6. For

the 4.19MHz operation with the oscillator circuit board OSC-2, see Figure 4.7.

Table 4.7 Pin assignments of the connector J6

Pin No.

Signal

Function

Power supply

GND

VCC

GND

CLK

Clock input

GND

Figure 4.6 Pin layout of the connector J6

Figure 4.7 Circuit diagram of oscillator circuit board OSC-2 (4.19 MHz)

( 18 / 38 )

4.6 Connecting to the Target System

(1) For 4502 and 4507 Groups

How to connect the M34502T-MCU to the target system when using for 4502 and 4507 Groups

is shown below.

Make note of the fact that it is not possible to connect the M34502T-MCU directly to the foot

pattern of the MCU package (24P2Q-A).

a. Connecting to 2.54-mm-pitch Dual-in-line Pins on the Target System

Use the 26-wire normal-pitch cable (included) to connect the 26-pin dual-in-line pins on the

target system. The following products are required for connection to the target system.

• 60-wire half-pitch cable (40 cm)

• Pitch converter board PCA4029

• 26-wire normal-pitch cable (10 cm)

Figure 4.8 shows the M34502T-MCU board connected to the target system using the 26-wire

normal-pitch cable. Table 4.8 lists the connector signal assignments of the 26-wire normal-pitch

cable. And Figure 4.9 shows the pin layout of the 26-wire normal-pitch cable.

Figure 4.8 Connection to the target system using dual-in-line pins

( 19 / 38 )

Table 4.8 26-wire normal-pitch cable pin assignments

EVDD*¹

P3⁰/AIN2

P31/AIN3

EP00

VSS

NC (XIN*²)

NC (X^OUT)

NC (CNV^SS)

ERESET

EP2¹/AIN1

EP20/AIN0

ED5

EP01

EP02

EP03

EP10

EP11

EP12/CNTR

EP13/INT

ED⁰

ED4

ED3

ED2

ED1

*1 EV^DDdoes not input the power supply from the target system, but outputs it to the target system

from the power circuit on the M34502T-MCU.

*2 XIN is input from oscillator circuit board OSC-2 on the M34502T-MCU and cannot be input from

the oscillator circuit on the target system.

Figure 4.9 Pin layout of the 26-wire normal-pitch cable

( 20 / 38 )

(2) For 4501, 4506 and 4580 Groups

How to connect the M34502T-MCU to the target system when using for 4501, 4506 and 4580

Groups is shown below.

Make note of the fact that it is not possible to connect the M34502T-MCU directly to the foot

pattern of the MCU package (20P2N-A).

a. Connecting to the IC Socket for 20-pin SDIP on the Target System

Attach the 26-wire normal-pitch cable (included) to pitch converter board M34501T-PTC to

connect the M34501T-MCU board with the IC socket for 20-pin SDIP on the target system.

Figure 4.10 shows the connection to the target system using the M34501T-PTC. And Figure

4.11 shows the pin assignments of the M34501T-PTC. The following products are required for

connection to the target system.

• 60-wire half-pitch cable (40 cm)

• Pitch converter board PCA4029

• 26-wire normal-pitch cable (10 cm)

• Pitch converter board M34501T-PTC

Table 4.9 lists the connector signal assignments of pitch converter board M34501T-PTC. The

pin assignments of the M34501T-PTC is the same as for the 20SDIP of the 4501 and 4506

Groups. When connecting pitch converter board M34501T-PTC, check the No. 1 pin positions

of the cable and the connector.

To avoid damage to the emulator and target system, be careful of the connection.

Figure 4.10 Connecting to an IC socket for 20-pin SDIP

( 21 / 38 )

Table 4.9 M34501T-PTC pin assignments

M34501T-PTC J2

EVDD*¹

EP0⁰

EP01

VSS

NC (XIN*²)

NC (X^OUT)

NC (CNV^SS)

ERESET

EP2¹/AIN1

EP20/AIN0

ED3

EP02

EP03

EP10

EP11

EP12/CNTR

EP13/INT

ED⁰

ED2

ED1

*1 EVDD does not input the power supply from the target system, but outputs it to the target system

from the power circuit on the M34502T-MCU.

*2 XIN is input from oscillator circuit board OSC-2 on the M34502T-MCU and cannot be input from

the oscillator circuit on the target system.

Figure 4.11 Pin layout of the M34501T-PTC

( 22 / 38 )

Some signals connected to the target system are emulated on the M34502T-MCU. For details, see

"6. Connection Circuit Diagram of the M34502T-MCU".

(1) Pins connected directly to the target system (2 types, 3 lines)

• P3⁰, P31*¹

• VSS

(2) Pins connected to the target system via emulation circuits and other devices. (6 types, 18 lines)

• P00 to P03

• P10 to P13

• P20, P21

• D0 to D5*²

• RESET

• EVDD*³

(3) Pins not connected to the target system (3 types, 3 lines)

• X^IN*⁴

• XOUT

• CNVSS

*1 For 4501, 4506 and 4580 Group MCUs, the ports P30 and P31 are not connected to the target

system when the M34501T-PTC is mounted.

*2 For 4501, 4506 and 4580 Group MCUs, the ports D4 and D5 are not connected to the target system

when the M34501T-PTC is mounted.

*3 EVDD does not input the power supply from the target system, but outputs it to the target system

from the power circuit on the M34502T-MCU. The output (ON/OFF) and the power supply (3

V/5 V) of EVDD are changed by the switches SW1 and SW3 respectively.

*4 XIN is input from oscillator circuit board OSC-2 on the M34502T-MCU and cannot be input from

the oscillator circuit on the target system. To change the frequency of the system clock, use

oscillator circuit board OSC-2 (included) with other necessary parts mounted.

4.7 LED

Figure 4.12 shows the LED layout of the M34502T-MCU. The LED lights in green when the power

is supplied.

Figure 4.12 Layout of the LED

( 23 / 38 )

MEMO

( 24 / 38 )

5. Precautions to Be Taken When Debugging

5.1 Reset

The M34502T-MCU uses a 74AC14 for its RESET signal input buffer, so that its electrical

characteristics differ from those of an actual MCU. Table 5.1 lists the RESET signal input

characteristics of the M34502T-MCU.

Table 5.1 RESET signal input characteristics

Item

Symbol Voltage (VCC)

3.0 V

Min.

Max.

2.2 V

3.2 V

3.9 V

H-level threshold voltage

V^P

4.5 V

5.5 V

3.0 V

4.5 V

5.5 V

3.0 V

4.5 V

5.5 V

0.5 V

0.9 V

1.1 V

0.3 V

0.4 V

0.5 V

L-level threshold voltage

Hysteresis voltage

1.2 V

1.4 V

1.6 V

5.2 System Clock

Depending on the supply voltage and operation modes, use one of the frequencies listed in Table 5.2.

Table 5.2 Operating frequencies of M34502T-MCU

Voltage

Mode

Default

Frequency

4.4 MHz or less

Low-speed

Medium-speed

High-speed

Default

3 V

3.0 MHz or less

1.5 MHz or less

Low-speed

Medium-speed

High-speed

5 V

4.4 MHz or less

To change this clock frequency to suit that of the target system, attach the necessary parts to oscillator

circuit board OSC-2 (included).

For details about the oscillation circuit constant, consult your oscillator manufacturer.

5.3 Real-time Capability of Timer

The PC4504 and M34502T-MCU have their internal clock operating even during emulation, so that

the timer values keep changing.

Example:

(1) When single-stepping the program

(2) When registers or internal RAM are referenced or modified

( 25 / 38 )

5.4 Watchdog Timer

The M34502T-MCU does not have an operational watchdog timer. Therefore, use an evaluation

MCU (OTP version) to verify the operation associated with a watchdog timer.

The M34502T-MCU outputs a signal whose waveform is shown below from the check pin TP5

during WRST instruction execution cycles. This signal allows you to check the initialization cycle

of a watchdog timer.

WRST instruction

Next instruction

System clock

X^IN

WRST

Figure 5.1 Waveform output from check pin TP5

5.5 Port I/O Timing

(1) Port input timing

Port input timings are the same as with each actual MCU.

(2) Port output timing

The output timings of the following ports are different from those of actual MCUs because of the

emulation circuits configured with the ports of the M34502T-MCU.

• Ports D⁰to D5

• Ports P00 to P03

• Ports P10 to P13

With actual MCUs, the changes occur at the beginning of the T3 state of an output instruction,

while with the M34502T-MCU, the changes occur at the beginning of the T2 state of the next

output instruction. Figure 5.2 shows the port output timings of actual MCUs and the M34502T-

MCU. For the other ports, the output timings are the same as those of actual MCUs.

Output instruction

Next output instruction

System clock

X^IN

P0, P1, D port

output timings

on actual MCUs

P0, P1, D port

output timings of

M34502T-MCU

Figure 5.2 D, P0 and P1 port output timings

( 26 / 38 )

5.6 Port I/O Characteristics

With the M34502T-MCU, port I/O characteristics are different from those of actual MCUs because

there is an emulation circuit in ports P0, P1, P2 and D0 to D5. Table 5.3 lists port I/O characteristics

of the M34502T-MCU.

Table 5.3 Emulation port I/O characteristics

Port

Device

Item

Voltage (VCC)

2.0 V

Min.

Max.

Remarks

1.5 V

V^IH

4.5 V

3.15 V

Input

74HC4050

2.0 V

0.5 V

1.35 V

VIL

4.5 V

P0, P1

IOH

IOL

250 µA V^OH= MAX

40 mA

Output

74LS06

4.75 V

0.4 V

0.7 V

I^OL= 16 mA

IOL = MAX

VOL

2.0 V

4.5 V

160 Ω

70 Ω

VI/O = VCC to GND

130 Ω II/O ≤ 1 mA

RON

V^I/O= VCC or GND

Input/

output

96 Ω

200 Ω

74HC4066

II/O ≤ 1 mA

VI/O = VCC to GND

I^I/O≤ 1 mA

RON

VIH

VIL

4.5 V

10 Ω

1.5 V

2.0 V

4.5 V

2.0 V

4.5 V

3.15 V

Input

74HC4050

74LS06

0.5 V

1.35 V

250 µA

40 mA

0.4 V

0.7 V

D⁵- D0

IOH

IOL

V^OH= MAX

Output

4.75 V

IOL = 16 mA

IOL = MAX

VOL

5.7 Pullup Transistor

Since ports P0, P1, D2 and D3 contain emulation circuits, the pullup transistor in an MCU cannot be used.

For the M34502T-MCU, the pullup resistor of 51 kΩ is mounted. When it is necessary to change the

pullup resistor, replace the resistance arrays of R3 and R4.

( 27 / 38 )

5.8 RAM Backup Mode

In the RAM backup mode, the M34502T-MCU operates differently from actual MCUs.

(1) On Port Output (Ports D, P0 and P1) in the RAM Backup Mode

With an actual MCU, the state of ports immediately before the RAM backup mode is retained,

while with the M34502T-MCU, it is not retained. (a restriction of the M34502T-MCU)

With the M34502T-MCU, in the RAM backup mode, ports D, P0 and P1 are held HIGH, and when

returned from the RAM backup mode they retain their previous state.

Therefore, to evaluate a system which needs ports D, P0 and P1 to be held LOW in the RAM

backup mode, you need an evaluation MCU (OTP version).

(2) RAM Operation of the M34502T-MCU

Though the actual chip is placed in the RAM backup mode by executing a combination of "EPOF"

and "POF" or "POF2" instructions, the M34502T-MCU is placed in the RAM backup mode by

only either "POF" instruction or "POF2" instruction.

In the M34502T-MCU, the "EPOF" instruction does not have any effect.

Program example 5.1

Actual MCU

The RAM backup mode works.

INY

EPOF

POF

•

M34502T-MCU

The RAM backup mode works.

Program example 5.2

Actual MCU

The RAM backup mode does NOT work.

INY

POF

•

M34502T-MCU

The RAM backup mode works.

( 28 / 38 )

5.9 Program Execution (G, GB)

According to the specifications of the PC4504 and M34502T-MCU, there are following restrictions

concerned to the operation of the program execution commands (G and GB commands).

(1) Continuous description of instructions

Hardware breakpoints set in a continuous description of instructions do not cause a break to occur

in the continuous description of instructions. A break occurs only after fetching the address where

the continuous description of instructions is discontinued. (See Program example 5.3)

However, a break does occur even in a continuous description of instructions when an external

trigger break or forced break is encountered. For execution to be resumed in this case, you need

to make sure that the execution start address is next to the continuous description of instructions.

(See Program example 5.4)

Program example 5.3

POINT:

; Continuous description of instructions

POINT+2:

XAM

If a break is set at POINT, execution is halted immediately before the XAM instruction at

address POINT+2.

Program example 5.4

POINT:

; Continuous description of instructions

POINT+1:

POINT+2:

XAM

If a forced or external trigger break is applied at POINT, execution is halted at POINT +1.

When resuming program execution after the break, make sure that the start address is at

POINT+2, an address immediately after the continuous description of instructions is

discontinued.

( 29 / 38 )

(2) Skip instructions (e.g. SNZP, INY, DEY, SZB, SEAM, SZC and RTS instructions)

When a skip instruction skips the next instruction, a breakpoint set in the skipped instruction does

not break. (See Program examples 5.5 and 5.6)

Program example 5.5

SZC

TABP

TAM

SZC

TABP

TAM

POINT:

POINTA:

•

A breakpoint set at address POINT causes execution to halt immediately before address

POINTA in only the case of the instruction shown on the right side.

Program example 5.6

; Skip instructions

INY

TABP

POINT:

•

If a break with pass count is set at address POINT, the count is taken and execution is

halted only when the instruction at address POINT is executed.

( 30 / 38 )

5.10 External Trigger Signal

(1) External trigger signal input timing

The latch timing of the external trigger signal is shown in Figure 5.3.

Instruction

Next Instruction

System clock

X^IN

External trigger signal

TRIG

Figure 5.3 Latch timing of external trigger signal

(2) External trigger signal input characteristics

Trigger breaks work according to the condition (leading edge/trailing edge) of signals input from

the external trace cable. The external trigger signals of the trace points and the external trigger

signals of the break points use the same signals. The input characteristics of the external trigger

signals are shown in Table 5.4 below. See the table before using external trigger signals.

Table 5.4 External trigger signal input characteristics

Item

Symbol

Voltage (V^CC)

2.0 V

Max.

Min.

1.5 V

V^IH

H-level voltage

4.5 V

3.15 V

2.0 V

0.5 V

1.35 V

L-level voltage

VIL

4.5 V

5.11 Other Precautions

With the M34502T-MCU if any of the following restrictions applies, it is necessary to evaluate the

system by an evaluation MCU (OTP version).

(1) The system which uses RESET output cannot be evaluated.

(2) The system which uses low-power detection function cannot be evaluated.

(3) The operation cannot be checked by a power-on reset.

(4) After resetting, it is not possible to change to the ceramic oscillation or CR oscillation by starting

up from the on-chip oscillator. After resetting, the system operates by the system clock of the

M34502T-MCU.

(5) As the operating voltage of the M34502T-MCU is 3 V or 5 V, the results of the A-D conversion

may differ from the theoretical values because of the difference with the voltage of the target

system.

(6) With the M34502T-MCU, it is not possible to evaluate the system which uses the multi

comparator function for 4580 Group.

( 31 / 38 )

MEMO

( 32 / 38 )

6. Connection Circuit Diagram of the M34502T-MCU

Figure 6.1 shows the connection circuit diagram of M34502T-MCU. This circuit diagram depicts the

M34502T-MCU connection centering on circuits connected to the target system. Emulator control

blocks and other similar circuits that are not connected to the target system are omitted in this diagram.

Figure 6.1 Connection circuit diagram of the M34502T-MCU

( 33 / 38 )

MEMO

( 34 / 38 )

7. External Dimensions of the Pitch Converter Board

7.1 M34501T-PTC

Figure 7.1 shows the external dimensions of the M34501T-PTC.

Figure 7.1 External dimensions of the M34501T-PTC

( 35 / 38 )

Appendix A. How to Request for Repair

If your product is found faulty, follow the procedure below to send your product for repair.

Customer

Fill in the Repair Request Sheet included with this product, then send it

along with this product for repair to your local distributor. Make sure

that information in the Repair Request Sheet is written in as much detail

as possible to facilitate repair.

Distributor

After checking the contents of fault, the distributor should please send

the faulty product along with the Repair Request Sheet to Renesas

Solutions Corp.

Renesas Solutions When the faulty product is repaired, it will be returned to the customer

at the earliest convenience.

CAUTION

Note on Transporting the Product:

• When sending your product for repair, use the packing box and cushion material supplied with this

product when delivered to you and specify handling caution for it to be handled as precision

equipment. If packing of your product is not complete, it may be damaged during transportation.

When you pack your product in a bag, make sure to use conductive polyvinyl supplied with this

product (usually a blue bag). When you use other bags, they may cause a trouble on your product

because of static electricity.

( 36 / 38 )

M34502T-MCU User's Manual

Rev.2.00

July 1, 2004

REJ10J0273-0200Z

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