38D5 datasheet(21/141 Pages) RENESAS

21 / 141 page

Rev.3.01

Aug 08, 2007

Page 21 of 134

REJ03B0158-0301

38D5 Group

Fig. 14 Port block diagram (1)

(1) Ports P0, P1, P24-P27, P3

(6) Port P43

(5) Port P42

(3) Port P40

Data bus

Serial I/O1 mode selection bit

Serial I/O1 enable bit

Serial I/O1 clock output

Port latch

Direction

Pull-up control

Serial I/O input

Data bus

Port latch

Serial I/O enable bit

Receive enable bit

Direction

Pull-up control

Direction

Data bus

Serial I/O1 mode selection bit

Serial I/O1 enable bit

SRDY1 output enable bit

Serial I/O1 ready output

Port latch

(4) Port P41

Data bus

Serial I/O output

Serial I/O1 enable bit

Transmit enable bit

Port latch

Direction

Pull-up control

(2) Ports P20-P23

Segment output disable bit

Direction

Data bus

Port latch

VL3/VL2

VL1/VSS

Segment data

Segment output disable bit

Direction

Data bus

Port latch

VL3/VL2

VL1/VSS

Segment data

Key input control

Key-on wakeup

interrupt input

P41/TxD P-channel output disable bit

Serial I/O1 clock input

Serial I/O1 synchronous clock

selection bit

Serial I/O1 enable bit

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