XR16C872 Ver la hoja de datos (PDF) - Exar Corporation

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componentes Descripción

Lista de partido

XR16C872

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

Exar Corporation 

Preliminary

XR16C872

AEN

A0-A15

IOW#

D0-D7

T3AS

Valid Address

T4AH

T9WR

Active

T6DY

T10DS

Valid Data

T11DH

Figure 10. ISA Bus Write Timing

XR872WR

IOW#

RTS#

DTR#

Outputs

CD#

CTS#

DSR#

Inputs

INT

IOR#

RI#

Rev. P1.00

Active

Change of state

T12D

Change of state

Change of state

T13D

Active

Active

Change of state

T13D

T14D

Active

Active

Figure 11. Modem Input/Output Timing

Active

Active

T13D

Change of state

XR872MD

51

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