TMPR28051 datasheet(35/90 Pages) AGERE

35 / 90 page

Data Sheet

August 1999

TMPR28051 STS-1/AU-3 (STM-0) Mapper

Lucent Technologies Inc.

Microprocessor Interface Description (continued)

Microprocessor Interface Pins

The mode [1—4] specific pin definitions are given in Table 13. Note that the microprocessor interface uses the

same set of pins in all modes.

Table 13. Mode [1—4] Microprocessor Pin Definitions

Configuration

Device Pin

Name

Generic Pin

Name

Pin Type

Assertion

Sense

Function

Mode 1

WR_DS

Input

Active-Low

Data Strobe

RD_R/W

R/W

Input

—

Read/Write

R/W = 1 for Read

R/W = 0 for Write

ALE_AS

Input

—

Address Strobe

Input

Active-Low

Chip Select

INT

Output

Active-High

Interrupt

RDY_DTACK

DTACK

Output

Active-Low

Data Acknowledge

AD[7:0]

I/O

—

Data Bus

A[7:0]

Input

—

Address Bus

Mode 2

WR_DS

Input

Active-Low

Data Strobe

RD_R/W

R/W

Input

—

Read/Write

R/W = 1 for Read

R/W = 0 for Write

ALE_AS

Input

—

Address Strobe

Input

Active-Low

Chip Select

INT

Output

Active-High

Interrupt

RDY_DTACK

DTACK

Output

Active-Low

Data Acknowledge

AD[7:0]

I/O

—

Address/Data Bus

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