Philips SC28L91 User Manual

Philips Semiconductors

Product data sheet

SC28L91

3.3 V or 5.0 V Universal Asynchronous
Receiver/Transmitter (UART)

2004 Oct 21

7

8

D0–D7

R/WN

CEN

A0–A3

RESETN

INTRN

X1/CLK

X2

4

BUS BUFFER

OPERATION CONTROL

ADDRESS

DECODE

R/W CONTROL

INTERRUPT CONTROL

IMR

ISR

TIMING

BAUD RATE

GENERATOR

CLOCK

SELECTORS

COUNTER/

TIMER

 

XTAL OSC

CSR

ACR

CTL

DATA CHANNEL

16 BYTE TRANSMIT

FIFO

TRANSMIT

SHIFT REGISTER

16 BYTE RECEIVE

FIFO

MRA0, 1, 2

CRA

SRA

INPUT PORT

CHANGE OF

STATE

DETECTORS (4)

OUTPUT PORT

FUNCTION

SELECT LOGIC

OPCR

TxDA

RxDA

IP0-IP5

OP0-OP7

V

CC

V

SS

CONTROL

TIMING

INTERNAL

 DA

T

ABUS

IPCR

ACR

OPR

CTU

8

6

WATCH DOG TIMER

RECEIVE SHIFT

REGISTER

SD00703

IVR

DACKN

IACKN