MT9123AE Ver la hoja de datos (PDF) - Mitel Networks

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MT9123AE

Dual Voice Echo Canceller

Mitel Networks 

MT9123

Preliminary Information

COMMAND/ADDRESS 

Œ

DATA INPUT

DATA 2

Receive

DATA 1

Transmit

R/W A5 A4 A3 A2 A1 A0 X

High Impedance

D7 D6 D5 D4 D3 D2 D1 D0

DATA OUTPUT

D7 D6 D5 D4 D3 D2 D1 D0

SCLK 

CS



Ž

ΠDelays due to internal processor timing which are transparent to the MT9123.

 The MT9123: latches receive data on the rising edge of SCLK

outputs transmit data on the falling edge of SCLK

Ž The falling edge of CS indicates that a COMMAND/ADDRESS byte will be transmitted from the microprocessor. The subsequent

byte is always data followed by CS returning high.

 A new COMMAND/ADDRESS byte may be loaded only by CS cycling high then low again.

 The COMMAND/ADDRESS byte contains: 1 bit - Read/Write

6 bits - Addressing Data

1 bit - Unused

Figure 11 - Serial Microport Timing for Motorola Mode 00 or National Microwire

8-60

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