Datasheet > TS68230FN

TS68230FN

更新时间： 2024-11-06 22:35:31

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
61页	2908K
描述
HMOS PARALLEL INTERFACE/TIMER

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数据手册

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TS68230FN 数据手册

TS68230

HMOS PARALLEL INTERFACE/TIMER

TS68000 BUS COMPATIBLE

PORT MODES INCLUDE :

BIT I/O

UNIDIRECTIONAL 8 BIT AND 16 BIT

BIDIRECTIONAL 8 BIT AND 16 BIT

PROGRAMMABLE HANDSHAKING OPTIONS

24-BIT PROGRAMMABLE TIMER MODES

FIVE SEPARATE INTERRUPT VECTORS

SEPARATE PORT AND TIMER INTERRUPT

SERVICE REQUESTS

REGISTERS ARE READ/WRITE AND DIRECT-

LY ADDRESSABLE

(PDIP48)

REGISTERS ARE ADDRESSED FOR MOVEP

(Move Peripheral) AND DMAC COMPATIBILITY

(PLCC52)

PIN CONNECTIONS

DESCRIPTION

The TS68230 parallel interface/timer (PI/T) provides

versatile double buffered parallel interfaces and a

system oriented timer for TS68000 systems. The pa-

rallel interfaces operate in unidirectional or bidirectio-

nal modes, either 8 or 16 bits wide. In the

unidirectional modes, an associated data direction

or output. In the bidirectional modes the data direc-

tion registers are ignored and the direction is deter-

mined dynamically by the state of four handshake

pins. These programmable handshake pins provide

an interface flexible enough for connection to a wide

variety of low, medium, or high speed peripherals or

other computer systems. The PI/T ports allow use of

vectored or auto-vectored interrupts, and also pro-

vide a DMA request pin for connection to the 68440

direct memory access controller (DMAC) or a similar

circuit. The PI/T timer contains a 24-bit wide counter

and a 5-bit prescaler. The timer may be clocked by

the system clock (PI/T CLK pin) or by an external

clock (TIN pin), and a 5-bit prescaler can be used. It

can generate periodic interrupts, a square wave, or

a single interrupt after a programmed time period. It

can also be used for elapsed time measurement or

as a device watchdog.

1/61

January 1989

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