TLC320AD535C-I Datasheet, PDF (38/43 Pages) Texas Instruments – DUAL CHANNEL VOICE/DATA CODEC

D7 D6 D5 D4
1
0
0—
0
1
1—
0
1
0—
0
0
1—
0
0
0—
——— 1
——— 0
——— 0
——— 0
——— 0
————
————
————
Default value: 00000000
D7 D6 D5 D4
1 ———
0 ———
— 1 ——
— 0 ——
—— 1 —
—— 0 —
——— 1
——— 0
————
————
————
————
————
————
————
————
Default value: 00000000
Table A–3. Control Register 2, Data Channel Control
D3 D2 D1 D0
DESCRIPTION
— — — — Data in (DTRX) PGA gain = mute
— — — — Data in (DTRX) PGA gain = 18 dB
— — — — Data in (DTRX) PGA gain = 12 dB
— — — — Data in (DTRX) PGA gain = 6 dB
— — — — Data in (DTRX) PGA gain = 0 dB
0
0 — — DAC data out PGA gain = mute
1
1 — — DAC data out PGA gain = –18 dB
1
0 — — DAC data out PGA gain = –12 dB
0
1 — — DAC data out PGA gain = –6 dB
0
0 — — DAC data out PGA gain = 0 dB
— — 1 — 8 ohm monitor speaker driver gain = 0 dB
— — 0 — 8 ohm monitor speaker driver gain = mute
— — — X Data channel ADC overflow indicator: ← 1 = overflow
Table A–4. Control Register 3, Voice Channel Control
D3 D2 D1 D0
DESCRIPTION
— — — — Voice channel software reset
— — — — Voice channel software reset not asserted
— — — — Software power down for voice channel enabled
— — — — Software power down for voice channel disabled
— — — — Voice channel digital loopback
— — — — Voice channel digital loopback not asserted
— — — — Voice channel digital loopback
— — — — Voice channel digital loopback not asserted
1 — — — TAPI preamp seleted for ADC input
0 — — — TAPI preamp not selected for ADC input
— 1 — — Microphone preamp selected for ADC input
— 0 — — Microphone preamp not selected for ADC input
— — 1 — Handset preamp not selected for ADC input
— — 0 — Handset preamp selected for ADC input
— — — 1 TAPI output buffer gain = mute
— — — 0 TAPI output buffer gain = 0 dB
A–2