TCM8000 Datasheet, PDF (7/19 Pages) Texas Instruments – CELLULAR TELEPHONE AUDIO PROCESSOR

TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
Table 1. Register Definitions
AD3
0
0
0
0
0
0
0
0
1
AD2
0
0
0
0
1
1
1
1
X
AD1
0
0
1
1
0
0
1
1
X
AD0
0
1
0
1
0
1
0
1
X
D3
VC3
TX3
SBY
HSS
–
RX3
STM
MT3
DA3
D2
VC2
TX2
RTM
TSM
NAT
RX2
ST2
MT2
DA2
D1
VC1
TX1
RVM
TVM
TTS
RX1
ST1
MT1
DA1
D0
VC0
TX0
CTM
TDM
CEN
RX0
ST0
MT0
DA0
FUNCTION
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>
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>
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
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
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)
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>
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
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>
DAC control
DA3 – DA0 set the level on the DAC output from 0 <0000> to VBRX <1111>
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