7480 datasheet(133/337 Pages) RENESAS

Il numero della parte	7480

Spiegazioni elettronici	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	337 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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7480 Group and 7481 Group User's Manual

1-116

1.14 Serial I/O

HARDWARE

(1)

Block Diagram of Clock Synchronous Serial I/O

Figure 1.14.8 shows the block diagram of a clock synchronous serial I/O.

Figure 1.14.8 Block Diagram of Clock Synchronous Serial I/O

Transmit interrupt source

selection bit (TIC)

Receive buffer full flag (RBF)

Receive interrupt request (RI)

Division ratio 1/(n + 1)

RxD

SCLK

XIN

TxD

P16

P14

P17

P15

Address 00E016

Receive buffer register

Receive shift register

Transmit buffer register

Transmit shift register

Serial I/O status register

Address 00E116

Serial I/O control register

Clock control circuit

Baud rate generator

Falling edge

detection

F/F

1/4

Transmit shift completion flag (TSC)

Transmit interrupt request (TI)

Transmit buffer empty flag (TBE)

Clock control circuit

1/4

Serial I/O synchronous clock

selection bit (SCS)

BRG count source

selection bit (CSS)

Transmit enable bit

(TE)

Receive enable bit

(RE)

Address 00E416

SRDY

SRDY output enable bit

(SRDY)

Serial I/O enable bit (SIOE)

Data bus

Address 00E016

Address 00E216

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