XR88C192CV datasheet(5/32 Pages) EXAR

Part #	XR88C192CV

Description	DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER

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Manufacturer	EXAR [Exar Corporation]

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XR88C92/192

5

Rev. 1.33

SYMBOL DESCRIPTION (* 44 pin LQFP)

OP5

16

9

O

Multi-purpose output. General purpose output or one of the

following functions can be selected for this output pin by

programming the Output Port Confiuration Register bit 5;

-RxBRDY - Receive ready signal (Open drain output)

-RxBFULL - Receive FIFO full signal (Open drain output)

OP6

29

24

O

Multi-purpose output. General purpose output or Transmit A

holding register empty interrupt (-TxARDY Open drain out-

put).

OP7

17

10

O

Multi-purpose output. General purpose output or Transmit B

holding register empty interrupt (-TxBRDY Open drain output)

A0-A3

2,4,

40,42,

6,7

44,1

I

Address select lines. To select internal registers.

XTAL1

36

30

I

Crystal input 1 or external clock input. A crystal can be

connected between this pin and XTAL2 pin to utilize the

internal oscillator circuit. An external clock can be used to

clock internal circuit and baud rate generator for custom

transmission rates.

XTAL2

37

31

O

Crystal input 2 or buffered clock output. See XTAL1.

GND

22

16,17

Pwr

Signal and power ground.

-INT

24

18

O

Interrupt output (open drain, active low) This pin goes low

upon occurrence of one or more of eight maskable interrupt

conditions (when enabled by the interrupt mask register).

CPU can read the interrupt status register to determine the

interrupting condition(s). This output requires a pull-up resis-

tor.

IP0

8

2

I

Multi-purpose input or Channel A Clear-To-Send (-CTSA

active low).

IP1

5

43

I

Multi-purpose input or Channel B Clear-To-Send (-CTSB

active low).

IP2

40

34

I

Multi-purpose input or Timer/Counter External clock input.

Symbol

Signal

Pin Description

44

44*

type

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