7641 datasheet(37/385 Pages) RENESAS

37 / 385 page

Rev.2.00

Aug 28, 2006

page 20 of 113

7641 Group

REJ09B0336-0200

HARDWARE

FUNCTIONAL DESCRIPTION

Fig. 15 Port block diagram (4)

(19) Port P82

Data bus

Direction

Port latch

(Serial I/O) SRXD input enable bit

(UART2) CTS function enable bit

Port latch

(UART2) CTS function enable bit

(UART2) CTS2 input

(Serial I/O) SRXD input

(21) Port P84

Data bus

Port latch

Direction

(UART1) Transmit enable bit

(UART1) UTXD1 output

(23) Port P86

Data bus

Direction

(UART1) CTS function enable bit

Port latch

(UART1) CTS1 input

(20) Port P83

Data bus

Direction

(UART2) RTS function enable bit

Port latch

Transmit completed signal

Serial I/O port select bit

STXD output channel

control bit

(Serial I/O) STXD output

(UART2) RTS2 input

(22) Port P85

Data bus

Direction

Port latch

(UART1) Receive enable bit

(UART1) URXD1 input

(24) Port P87

Data bus

Direction

(UART1) RTS function enable bit

Port latch

(UART1) RTS1 output

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