M3885 datasheet(18/103 Pages) RENESAS

18 / 103 page

3885 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

✻2. The input level can be switched between CMOS compatible input level and TTL level by the P7 input level selection bit of the port

control register 2 (PCTL2).

Reading the port P8 direction register is switched to port P7 pin input level by the P8 function selection bit of the port control register 2

(PCTL2).

✻3. The input level can be switched between CMOS compatible input level and SMBUS level by the I2C-BUS interface pin input selection

bit of the I2C control register (SID).

(18) Ports P73 to P75

Data bus

Port latch

Direction

Interrupt input

✻2

(19) Port P76

Data bus

Port latch

Direction

SDA output

SDA input

✻3

I2C-BUS interface

enable bit

(20) Port P77

I2C-BUS interface

enable bit

SCL output

SCL input

✻3

Direction

Port latch

Data bus

(21) Ports P80 to P83

LAD [3 : 0]

LPC enable bit

Data bus

Port latch

Direction

(22) Ports P84 to P86

LRESET

LCLK

LFRAME

LPC enable bit

Data bus

Port latch

Direction

(23) Port P87

IRQSER

SIRQ enable bit

Data bus

Port latch

Direction

(17) Ports P70 to P72

Data bus

Port latch

Direction

✻2

Fig. 12 Port block diagram (3)

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