SCC2698B 데이터 시트보기 (PDF) - Philips Electronics

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SCC2698B

Enhanced octal universal asynchronous receiver/transmitter (Octal UART)

Philips Electronics 

Philips Semiconductors

Enhanced octal universal asynchronous

receiver/transmitter (Octal UART)

Product specification

SCC2698B

BLOCK DIAGRAM

8

D0–D7

RDN

WRN

CEN

6

A0–A5

RESET

X1/CLK

X2

BUS BUFFER

TIMING

CONTROL

OPERATION CONTROL

ADDRESS

DECODE

R/W CONTROL

INTERNAL DATA

BUS

TIMING

CRYSTAL

OSCILLATOR

POWER-ON

LOGIC

BLOCK B

(SAME AS A)

BLOCK C

(SAME AS A)

BLOCK D

(SAME AS A)

CHANNEL A

TRANSMIT HOLD

REGISTER

TRANSMIT SHIFT

REGISTER

RECEIVE HOLD

REGISTER (3)

RECEIVE SHIFT

REGISTER

MR1, 2

CR

SR

CSR Rx

CSR Tx

CHANNEL B

(AS ABOVE)

INPUT PORT

CHANGE-OF-

STATE

DETECTORS (4)

IPCR

ACR

OUTPUT PORT

FUNCTION SELECT

LOGIC

OPCR

TIMING

CLOCK

SELECTORS

COUNTER/

TIMER

ACR

CTUR

CTLR

INTERRUPT CONTROL

IMR

ISR

BLOCK A

TxDA

RxDA

TxDb

RxDb

2

MPI0

2

MPIb

2

MPP1

2

MPP2

2

MPO

INTRAN

Figure 2. Block Diagram

SD00185

2000 Jan 31

4

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