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MT91L60AN

ISO2-CMOS 3 Volt Multi-Featured Codec (MFC) Advance Information

Mitel Networks

MT91L60AN Datasheet PDF : 32 Pages

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Advance Information

MT91L60/61

When 0, D-Channel data is shifted at the rate of 2

bits/frame (16 kb/s default).

16 kb/s D-Channel operation is the default mode

which allows the microprocessor access to a full byte

of D-Channel information every fourth ST-BUS

frame. By arbitrarily assigning ST-BUS frame n as

the reference frame, during which the

microprocessor D-Channel read and write operations

are performed, then:

COMMAND/ADDRESS

DATA INPUT/OUTPUT

COMMAND/ADDRESS:

DATA 1

RECEIVE

D0 D1 D2 D3 D4 D5 D6 D7

DATA 1

TRANSMIT

SCLK y

D0 D1 D2 D3 D4 D5 D6 D7

Delays due to internal processor timing which are transparent.

y The MT91L60/L61:latches received data on the rising edge of SCLK.

-outputs transmit data on the falling edge of SCLK.

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

subsequent byte is always data until terminated via 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

3 bits - Addressing Data

4 bits - Unused

X A2 A1 A0 R/W

Figure 4 - Serial Port Relative Timing for Intel Mode 0

COMMAND/ADDRESS

DATA INPUT/OUTPUT

COMMAND/ADDRESS:

DATA 2

RECEIVE

D7 D6 D5 D4 D3 D2 D1 D0

DATA 1

TRANSMIT

SCLK y

D7 D6 D5 D4 D3 D2 D1 D0

Delays due to internal processor timing which are transparent .

y The MT91L60/L61: latches received data on the rising edge of SCLK.

-outputs transmit data on the falling edge of SCLK.

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

subsequent byte is always data until terminated via 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

3 bits - Addressing Data

4 bits - Unused

R/W X X

X A2 A1 A0 X

Figure 5 - Serial Port Relative Timing for Motorola Mode 00/National Microwire

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