SLOS982C August 2017 – April 2018 TAS5755M
PRODUCTION DATA.
The system control register 1 has several functions:
Bit D7: | If 0, the dc-blocking filter for each channel is disabled.
If 1, the dc-blocking filter (–3 dB cutoff <1 Hz) for each channel is enabled (default). |
Bit D5: | If 0, use soft unmute on recovery from clock error. This is a slow recovery. Unmute takes the same time as the volume ramp defined in register 0x0E.
If 1, use hard unmute on recovery from clock error (default). This is a fast recovery, a single step volume ramp |
Bits D1–D0: | Select de-emphasis |
D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 | FUNCTION |
0 | – | – | – | – | – | – | – | PWM high-pass (dc blocking) disabled |
1 | – | – | – | – | – | – | – | PWM high-pass (dc blocking) enabled(1) |
– | 0 | – | – | – | – | – | – | Reserved(1) |
– | – | 0 | – | – | – | – | – | Soft unmute on recovery from clock error |
– | – | 1 | – | – | – | – | – | Hard unmute on recovery from clock error(1) |
– | – | – | 0 | – | – | – | – | Reserved(1) |
– | – | – | – | 0 | – | – | – | Reserved(1) |
– | – | – | – | – | 0 | – | – | Reserved(1) |
– | – | – | – | – | – | 0 | 0 | No de-emphasis(1) |
– | – | – | – | – | – | 0 | 1 | De-emphasis for fS = 32 kHz |
– | – | – | – | – | – | 1 | 0 | De-emphasis for fS = 44.1 kHz |
– | – | – | – | – | – | 1 | 1 | De-emphasis for fS = 48 kHz |