MT90737 Просмотр технического описания (PDF) - Mitel Networks

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Компоненты Описание

производитель

MT90737

CMOS DS3/DS1 MUX/DEMUX (M13)

Mitel Networks 

Preliminary Information

CMOS MT90737

Microprocessor Interface

Pin #

Name I/O/P

Description

162

µP0

I Microprocessor Interface Type Select. TTL Type II compatible. The type of

161

µP1

microprocessor interface selected is given in the table below:

85, 86

S(7-6)

µP1

µP0

Interface

0

0

Intel Compatible

0

1

Motorola Compatible

1

0

Multiplexed

1

1

Not Used

The multiplexed interface consists of eight bi-directional address/data leads,

select, address latch enable, read, and write.

The Intel compatible interface (80X86 family) consists of eight address leads,

eight bi-directional data leads, select, read, write, and ready.

The Motorola compatible interface (680X0 family) consists of eight address

leads, eight bi-directional data leads, select, read/write, and data transfer

acknowledge.

I Address Straps. TTL Type II compatible. When the Intel, Motorola, or Multi-

plexed microprocessor interfaces are selected by µP0 and µP1, the two

address straps, S7 and S6, allow the MT90737 to be partitioned as a segment

of memory. The straps define the address offset of the device. The address

register is partitioned as shown below. The data register pointed to by the 6

LSBs is only accessed if the 2 MSBs match the address straps.

Bit 7 6

MT90737

Address

Register

Address

87

IC

- Internal Connection. Keep open.

Note: I = Input; O = Output; P = Power. See DC Characteristics section for CMOS and TTL Type definitions.

5-69

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