XR16C872IQ View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR16C872IQ

Dual UART with 1284 Parallel Port and Plug-and-Play Controller

Exar Corporation 

Prev 41 42 43 44 45 46 47 48 49 50 Next

Preliminary

UART Registers Reset Conditions

Register

Reset State

RHR

THR

IER

FCR

ISR

LCR

MCR

LSR

MSR

SPR

DLL

DLM

TRG

FCTR

EFR

Xon-1

Xon-2

Xoff-1

Xoff-2

EMSR

0xXX, X=random

0xXX, X=random

0x00

0x00

0x01

0x00

0x00

0x60

0xX0, X=state of input pins

0xFF

0xXX, X=random

0xXX, X=random

0x00

0x00

0x00

0x00

0x00

0x00

0x00

0x00

Output

Signals

TX A-B

RTS# A-B

DTR# A-B

Reset State

logic 1

logic 1

logic 1

1284 Controller Register Reset Conditions

Register

ECP-AFIFO

DSR

DCR

EPP-APort

EPP-DPortA

EPP-DPortB

EPP-DPortC

EPP-DPortD

CONF-A

CONF-B

ECR

Reset State

0xXX, X=state of input pins

Bit 0-4=0

Bit 0-7=0

Bit 0-5=0

0x95

XR16C872

Rev. P1.00

49

Share Link: