MT9196AS datasheet(27/38 Pages) MITEL

27 / 38 page

Preliminary Information

MT9196

7-153

Programming Examples

Some examples of the programming steps required

to set-up various telephony functions are given. Note

that these steps are from the power-up reset default

definition. If some other state is currently true then

some programming steps may be omitted while new

ones may be required.

Initialization

Description

Address

DATA

choose ST-BUS vs SSI

(ie ST-BUS with C&D channels enabled)

or (ie SSI at 256kHz BCL)

10h

70h

05h

power up oscillator and FDI

same as above with B2 channel for ST-BUS

0Eh

00h (other bits as required)

04h (other bits as required)

A-Law vs

µ-Law as required

(ie CCITT

µ-Law and gains low)

or (ie CCITT A-Law and gains increased)

0Fh

00h (default value so no write required)

2Ch

Standard Full-duplex handset call

Description

Address

DATA

program Initialization steps above

set sidetone gain (ie 0 dB)

set gain (ie Rx = +3 dB, Tx = 0 dB)

0Bh

19h

04h (leave speaker gain defaulted to 0dB)

89h (or as required, defaults = 0dB)

select transmit path

(ie handset mic to B2 for ST-BUS)

or (ie handset mic for SSI)

12h

09h

01h

select receive path

(ie handset speaker to Rx filter plus

sidetone)

or (as above plus receive to AUXout also)

13h

81h (for standard headset only)

91h

optional:

set Filter/CODEC Rx and Tx gain

0Ah

as required (0dB default)

Group Listening

Description

Address

DATA

program Initialization steps above

set gain (ie Rx = +3 dB, Tx = 0 dB)

19h

89h (or as required, defaults = 0dB)

set sidetone gain (ie 0 dB) and also

set handsfree speaker gain independent

of the rest of the receive path (ie 12dB)

0Bh

94h

set high threshold level

set low threshold level

1Dh

1Eh

as required or leave default value

enable group listening with 12dB of atten.

1Ch

A4h

select transmit path

(ie handset mic to B2 for ST-BUS)

or (ie handset mic for SSI)

12h

09h

01h

MT9196AS Datasheet(PDF) 27 Page - Mitel Networks Corporation

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