AM85C30(1992) Ver la hoja de datos (PDF) - Advanced Micro Devices

Número de pieza

componentes Descripción

Fabricante

AM85C30
(Rev.:1992)

Serial Communications Controller

Advanced Micro Devices 

AMD

General Information

1.4

Pin Functions

The SCC pins are divided into seven functional groups: Address/Data, Bus Timing and

Reset, Device Control, Interrupt, Serial Data (both channels), Peripheral Control (both

channels), and Clocks (both Channels). Figures 1–3 and 1–4 show the pins in each func-

tional group for the 40- and 44-pin SCC versions.

The Address/Data group consists of the bidirectional lines used to transfer data between

the CPU and the SCC. The direction of these lines depends on whether the SCC is se-

lected and whether the operation is a Read or a Write.

The Timing and Control groups designate the type of transaction to occur and when this

transaction will occur. The Interrupt group provides inputs and outputs to conform to the

Z-Bus specifications for handling and prioritizing interrupts. The remaining groups are di-

vided into Channel A and Channel B groups for serial data (transmit or receive), peripher-

al control (such as DMA or Modem), and the input and output lines for the receive and

transmit clocks.

Data

Bus

8

Bus

Timing

and Reset

Control

Interrupt

D0 - D7

RD

WR

A/B

CE

D/C

INT

INTACK

IEI

IEO

Am85C30/

Am8530H

SCC

TxDA

RxDA

TRxCA

RTxCA

SYNCA

W/REQA

DTR / REQA

RTSA

CTSA

DCDA

TxDB

RxDB

TRxCB

RTxCB

SYNCB

W/REQB

DTR/REQB

RTSB

CTSB

DCDB

Serial

Data

Channel

Clocks

Channel

Controls

for Modem,

DMA, or

Other

Serial

Data

Channel

Clocks

Channel

Controls

for Modem,

DMA, or

Other

+5 V

GND PCLK

Figure 1–3. SCC Pin Functions

10216A-004A

1–6

Share Link: