MT89L80AN Ver la hoja de datos (PDF) - Mitel Networks

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componentes Descripción

Fabricante

MT89L80AN

CMOS ST-BUS™ FAMILY Digital Switch

Mitel Networks 

Advance Information

MT89L80

Pin Description (continued)

Pin #

44 48

PLCC SSOP

Name

Description

19-21 20-22 A3-5 Address 3-5 / Input Streams 11-13 (5V-tolerant Input). These are the inputs for the

address lines on the microprocessor interface.

22 23

23 24

24 26

25-27 27-29

DS Data Strobe (5V-tolerant Input). This is the input for the active high data strobe on the

microprocessor interface.

R/W Read/Write (5V-tolerant Input). This is the input for the read/write signal on the

microprocessor interface - high for read, low for write.

CS Chip Select (5V-tolerant Input). This is the input for the active low chip select on the

microprocessor interface

D7-D5 Data Bus (5V-tolerant I/O): These are the bidirectional data pins on the microprocessor

interface.

29-33 31-35 D4-D0 Data Bus (5V-tolerant I/O): These are the bidirectional data pins on the microprocessor

interface.

34

1,

VSS Ground.

25,37

35-39 38-42 STo7-3 ST-BUS Outputs 7 to 3 (5V-Tolerant Three-state Outputs). These are the pins for the

eight 2048 kbit/s ST-BUS output streams.

41-43 44-46 STo2-0 ST-BUS Outputs 2to 0 (5V-Tolerant Three-state Outputs). These are the pins for the

eight 2048kbit/s ST-BUS output streams.

44 47

1

48

6, 18, 6, 19,

28, 40 30, 43

ODE

Output Drive Enable (5V-tolerant Input). If this input is held high, the STo0-STo7 output

drivers function normally. If this input is low, the STo0-STo7 output drivers go into their

high impedance state. NB: Even when ODE is high, channels on the STo0-STo7

outputs can go high impedance under software control.

CSTo Control ST-BUS Output (5V-Tolerant Output). Each frame of 256 bits on this ST-BUS

output contains the values of bit 1 in the 256 locations of the Connection Memory High.

NC No Connection.

2-5

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