7512 datasheet(13/87 Pages) RENESAS

13 / 87 page

Feb 18, 2005

page 13 of 85

REJ03B0122-0101

7512 Group

Fig. 10 Port block diagram (2)

(15) Port P25

Data bus

Serial I/O1 enable bit

Transmit enable bit

SDA/SCL pin selection bit

I2C-BUS interface enable bit

SCL input

Serial I/O1 output

SCL output

SDA/SCL pin selection bit

(12) Port P22

Data bus

SDA output

SDA input

I2C-BUS interface enable bit

Data bus

(16) Port P26

Serial I/O1 enable bit

Serial I/O1 mode selection bit

Serial I/O1 enable bit

Serial I/O1 synchronous clock

selection bit

Serial I/O1 external

clock input

Serial I/O1 clock output

(14) Port P24

SDA output

SDA input

SDA/SCL pin selection bit

I2C-BUS interface enable bit

Data bus

Serial I/O1 input

Serial I/O1 enable bit

Receive enable bit

(13) Port P23

Data bus

SDA/SCL pin selection bit

SCL output

SCL input

(11) Port P21

Data bus

Port XC switch bit

Sub-clock generating circuit input

(10) Port P20

Data bus

Port XC switch bit

Port P21

Port Xc switch bit

32kHz RC Oscillation enable bit

Reference

voltage

(9) Port P1

Data bus

Direction

Port latch

Direction

Port latch

Direction

Port latch

Direction

Port latch

Direction

Port latch

Direction

Port latch

Direction

Port latch

Direction

Port latch

I2C-BUS interface enable bit

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