TCM8000

CELLULAR TELEPHONE AUDIO PROCESSOR

SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993

POST OFFICE BOX 655303

7

Table 1. Register Definitions

AD3

AD2

AD1

AD0

D3

D2

D1

D0

FUNCTION

0

0

0

0

VC3

VC2

VC1

VC0

Volume control

VC3 –VC0 set the output level on HFO and HSO in 2-dB steps from – 16 dB

<0000> to 14 dB <1111> relative to nominal, <1000>

0

0

0

1

TX3

TX2

TX1

TX0

TXTRIM gain adjust

TX3 –TX0 set the main transmit output level in 0.5-dB steps from – 4 dB

<0000> to 3.5 dB <1111> relative to nominal, <1000>

0

0

1

0

SBY

RTM

RVM

CTM

SBY: Standby/ active control, when set to 1, all sections of the device are

active; when set to 0, all sections apart from from the receive data path are

disabled.

RTM: Receive DTMF/tone mute, 1 = mute, 0 = enabled

RVM: Receive voice mute, 1 = mute, 0 = active

CTM: Call tone mute, 1 = mute, 0 = active

0

0

1

1

HSS

TSM

TVM

TDM

HSS: Handset select, 1 selects HSO RX output and M1 preamplifier,

0 selects HFO output and M2 preamplifier

TSM: TXSUM mute, 1 = mute, 0 = active

TVM: Transmit voice mute, 1 = mute, 0 = active

TDM: Transmit data-path mute, 1 = mute, 0 = active

0

1

0

0

–

NAT

TTS

CEN

NAT: NMT– AMPS/TACS select, 1 = NMT, 0 = AMPS/TACS

TTS: Transmit DTMF/tone select, 1 = DTMF/tone, 0 = TX voice

CEN: Compandor enable, 1 = compressor/expander enabled,

0 = bypassed (0-dB gain)

0

1

0

1

RX3

RX2

RX1

RX0

RXTRIM gain adjust

RX3 –RX0 set the main transmit output level in 0.5-dB steps from – 4 dB

<0000> to 3.5 dB <1111> relative to nominal, <1000>

0

1

1

0

STM

ST2

ST1

ST0

SATTRIM gain adjust

ST3 –ST0 set the receive SAT gain in 1-dB steps from – 4 dB <000> to 3 dB

<111> relative to nominal, <100>,

STM: Receive SAT path mute, 1 = mute, 0 = active

0

1

1

1

MT3

MT2

MT1

MT0

MICTRIM gain adjust

MT3 –MT0 set the microphone trim gain in 0.5-dB steps from – 4 dB <0000>

to 3.5 dB <1111> relative to nominal, <1000>

1

X

X

X

DA3

DA2

DA1

DA0

DAC control

DA3 –DA0 set the level on the DAC output from 0 <0000> to VBRX <1111>