ST16C580CQ48 datasheet(3/39 Pages) EXAR

No. de pieza	ST16C580CQ48

Descripción Electrónicos	UART WITH 16-BYTE FIFO?셲 AND INFRARED (IrDA) ENCODER/DECODER

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Fabricante Electrónico	EXAR [Exar Corporation]

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ST16C580

3

Rev. 1.22

SYMBOL DESCRIPTION

A0

28

I

Address-0 Select Bit - Internal registers address selection.

A1

27

I

Address-1 Select Bit Internal registers address selection.

A2

26

I

Address-2 Select Bit Internal registers address selection.

IOR

20

I

Read strobe. Its function is the same as -IOR (see -IOR),

except it is active high. Either an active -IOR or IOR is

required to transfer data from 580 to CPU during a read

operation.

CS0

9

I

Chip Select-0. A logical 1 on this pin provides the chip select

0 function.

CS1

10

I

Chip Select-1. A logical 1 on this pin provides the chip select

1 function.

-CS2

11

I

Chip Select -2. A logical 0 on this pin provides the chip select

2 function.

IOW

17

I

Write strobe. A logic 1 transition creates a write strobe. Its

function is the same as -IOW (see -IOW), but it acts as an

active high input signal. Either -IOW or IOW is required to

transfer data from the CPU to 580 during a write operation.

-AS

24

I

Address Strobe. A logic 1 transition on -AS latches the state

of the chip selects and the register select bits, A0-A2. This

input is used when address and chip selects are not stable for

the duration of a read or write operation, i.e., a microprocessor

that needs to de-multiplex the address and data bits. If not

required, the -AS input can be permanently tied to a logic 0

(it is edge triggered).

D0-D7

43-47

2-4

I/O

Data Bus (Bi-directional) - These pins are the eight bit, three

state data bus for transferring information to or from the

controlling CPU. D0 is the least significant bit and the first

data bit in a transmit or receive serial data stream.

GND

18

Pwr

Signal and Power Ground.

Symbol

Signal

Pin Description

48

type

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Descripción similar - ST16C580CQ48

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ST16C580CQ48 Datasheet(PDF) 3 Page - Exar Corporation

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