XR16C854 Просмотр технического описания (PDF) - Exar Corporation

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XR16C854

2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

Exar Corporation 

XR16C854/854D

2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

xr

REV. 3.0.1

Pin Description

NAME

64-LQFP

PIN #

68-PLCC

PIN#

100-QFP

PIN #

TYPE

DESCRIPTION

N.C.

-

-

1, 2, 3, 4,

26, 27,

28, 29,

30, 51,

52, 53,

54, 55,

77, 78,

79, 80

No Connection. These pins are not used in either the Intel or

Motorola bus modes.

Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.

Factory Test Mode

If the IOR#, IOW# and CS# pins are all asserted (at a logic 0) simultaneously, the 854 will enter a Factory Test

Mode. The 854 is not operational in this mode and will exit this mode only upon a power cycle.

8

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