Product data

32176 Group

Mitsubishi Microcomputers

SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER

Under Development

Jan. 30, 2003 Rev.1.4

Table 4. Description of Pin Function (1/4)

Type Pin Name Input/Output Function

Power VCCE Power supply - Power supply (5.0V ± 0.5V or 3.3V ± 0.3V).

EXCVCC Internal power - External capacitance connecting pin.

supply

VDDE RAM power supply - Internal RAM backup power supply (5.0V ± 0.5V or 3.3V ± 0.3V).

EXCVDD Internal power - Backup power supply for the internal RAM, external capacitance con

supply of RAM necting pin.

VSS Ground - Connect all VSS pins to ground (GND).

Clock XIN Clock input Input Clock input/output pins. These pins contain a PLL-based

XOUT Clock output Output frequency multiply-by-4, so input the clock whose frequency is quarter

the operating frequency. (XIN input = 10 MHz when CPU clock operates

at 40 MHz)

BCLK System clock Output Outputs a clock twice the externally sourced clock frequency, XIN

(when the internal CPU memory clock is 80 MHz, BCLK output = 20

MHz).

Use this output when external sync design is desired.

EXCOSC Internal power - External capacitance connecting pin.

-VCC supply

OSC-VSS Ground - Connect OSC-VSS to ground.

Reset RESET# Reset Input This pin resets the internal circuits.

Mode MOD0, Mode Input These pins set an operation mode.

MOD1 MOD0 MOD1 Mode

0 0 Single-chip mode

0 1 Expanded external mode

1 0 Processor mode

(Boot mode) (Note 1)

1 1 (Reserved)

MOD2 Mode Input Please be sure to connect MOD2 to ground (GND).

Flash-only FP Flash Protect Input This pin protects the flash memory against E/W in hardware.

Address A12-A30 Address Output 19 lines of address bus (A12-A30) are provided to accommodate two

bus bus channels of 1 MB memory space (max.) connected external to the

chip. A31 is not output.

Data bus DB0-DB15 Data bus Input/output This is a 16-bit data bus connecting to an external device. During write

cycle, the microcomputer outputs BHW# or BLW# to indicate the valid

byte write position of the 16-bit data bus. During read cycle, the micro

computer always reads the full 16-bit data bus. Transferred to the internal

circuit of the M32R, however, is the data at only the valid byte position.

Note 1: In boot mode, the FP pin must be at the high level.