Mitsubishi Electric M32R Series User Manual page 190

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

The diagram below shows an example of user system configuration which has had a serial

programmer connected. After the user system is powered on, the serial programmer writes to the

flash memory in clock-synchronized serial mode. No communication problems associated with the

oscillation frequency may occur. If the system uses any 32170 pins which will connect to a serial

programmer, care must be taken to prevent adverse effects on the system when a serial

programmer is connected. Note that the serial programmer uses the addresses H'0000 0084

through H'0000 0093 as an area to check ID for flash memory protection.

Various signals on flash

TxD (Output)

SCLKO(Output)

BUSY (Input)

MOD0 (Output)

RESET(Output)

GND (Output)

Note 1 : Turn on the power to the user system before you write to the flash memory.

Note 2 : If the system circuit uses P83-P87, consideration must be taken for connection of a serial programmer.

Note 3 : P83 must have a high-level signal applied to it.

Note 4 : P64/SBI must be fixed high or low to ensure that interrupts will not be generated.

Note 5 : The pullup resistances of P83, P84, P86, and P87 must be set to suit system design conditions.

Note 6 : The typical pullup resistances of P83, P84, P86, and P87 are 4.7 to 10 kΩ.

Note 7 : All other ports, whether high or low, do not affect flash memory programming.

Figure 6.8.1 Pin Connection Diagram

User system circuit board

Connects to 5 V power supply

Connects to 3.3 V power supply

To system circuit

Set microcomputer

operating conditions

INTERNAL MEMORY

6.8 Connecting to A Serial Programmer

AVCC0, AVCC1

VREF0, VREF1

P87/SCLKI1/SCLKO1

P84/SCLKI0/SCLKO0

AVSS0, AVSS1