M16CSLASH62M datasheet(46/615 Pages) RENESAS

46 / 615 page

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Bus Settings

1-27

P56

I/O port

ALE

P57

I/O port

RDY

P00 to P07

I/O port

Data bus

I/O port

Either CS1 or CS2 is for

multiplexed bus and others

are for separate bus

(separate bus)

multiplexed

bus for the

entire

space

Single-chip

mode

Memory expansion mode/microprocessor modes

Memory

expansion mode

Data bus width

BYTE pin level

Port P40 to P43

function select bit = 0

“01”, “10”

“00”

“11” (Note 1)

8 bit

“H”

8 bits

“H”

16 bits

“L”

8 bits

“H”

16 bits

“L”

Note 1: If the entire space is of multiplexed bus in memory expansion mode, choose an 8-bit width.

The processor operates using the separate bus after reset is revoked, so the entire space multiplexed bus cannot be

chosen in microprocessor mode.

P31 to P37 become a port if the entire space multiplexed bus is chosen, so only 256 bytes can be used

in each chip select.

Note 2: Address bus when in separate bus mode.

Processor mode

Multiplexed bus

space select bit

CS (chip select) or programmable I/O port

(For details, refer to “Bus control”)

Outputs RD, WRL, WRH, and BCLK or RD, BHE, WR, and BCLK

(For details, refer to “Bus control”)

Port P40 to P43

function select bit = 1

P10 to P17

I/O port

Data bus

I/O port

Data bus

I/O port

P21 to P27

I/O port

Address bus

/data bus(Note 2)

/data bus

P20

I/O port

Address bus

/data bus(Note 2)

/data bus

P30

I/O port

Address bus

A8/D7

/data bus(Note 2)

P31 to P37

I/O port

Address bus

I/O port

P40 to P43

I/O port

P40 to P43

I/O port

Address bus

I/O port

P44 to P47

I/O port

P50 to P53

I/O port

P54

I/O port

HLDA

P55

I/O port

HOLD

Table 1.8.2. Pin functions for each processor mode

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