7549 datasheet(19/86 Pages) RENESAS

19 / 86 page

Rev.2.02

Mar 31, 2009

Page 17 of 81

REJ03B0202-0202

7549 Group

Fig 16. Block diagram of pins (1)

INT0 input

Data bus

Port latch

Pull-up control bit

(1) Port P00

Drive capacity

control bit

Data bus

INT1 input

(2) Port P01

(3) Port P02

(4) Port P03

CAP0 input

(5) Port P04

Serial I/O input

Receive enable bit

Serial I/O enable bit

(6) Port P05

Transmit enable bit

P05/TXD P-channel output disable bit

(7) Port P06

Serial I/O mode selection bit

Serial I/O enable bit

Serial I/O synchronous

clock selection bit

Serial I/O clock output

(8) Port P07

SRDY output enable bit

Serial I/O ready output

represents a parasitic diode.

No current flow is possible. Ensure that the input voltage

to each pin does not exceed the absolute maximum rating.

Note:

Port latch

Direction

Pull-up control bit

Drive capacity

control bit

Pull-up control bit

Direction

Data bus

Port latch

Drive capacity

control bit

Pull-up control bit

Data bus

Direction

Port latch

Drive capacity

control bit

Pull-up

control bit

Direction

Port latch

Data bus

Drive capacity

control bit

Data bus

Pull-up control bit

Direction

Port latch

Drive capacity

control bit

Pull-up control bit

Direction

Port latch

Data bus

Drive capacity

control bit

Pull-up control bit

Direction

Port latch

Data bus

Drive capacity

control bit

Serial I/O output

Serial I/O enable bit

Serial I/O clock input

Serial I/O mode selection bit

Serial I/O enable bit

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