SLOS982C August 2017 – April 2018 TAS5755M
PRODUCTION DATA.
Bits D2–D0: | Volume slew rate (Used to control volume change and MUTE ramp rates). These bits control the number of steps in a volume ramp. Volume steps occur at a rate that depends on the sample rate of the I2S data as follows | |
Sample Rate (KHz) | Approximate Ramp Rate | |
8/16/32 | 125 µs/step | |
11.025/22.05/44.1 | 90.7 µs/step | |
12/24/48 | 83.3 µs/step |
D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 | FUNCTION |
1 | – | – | 1 | 0 | – | – | – | Reserved(1) |
– | 0 | – | – | – | – | – | – | Subchannel (ch4) volume = ch1 volume(1)(1) |
– | 1 | – | – | – | – | – | – | Subchannel volume = register 0x0A(1) |
– | – | 0 | – | – | – | – | – | Ch3 volume = ch2 volume(1) |
– | – | 1 | – | – | – | – | – | Ch3 volume = register 0x0A |
– | – | – | – | – | 0 | 0 | 0 | Volume slew 512 steps (43-ms volume ramp time at 48 kHz) |
– | – | – | – | – | 0 | 0 | 1 | Volume slew 1024 steps (85-ms volume ramp time at 48 kHz)(1) |
– | – | – | – | – | 0 | 1 | 0 | Volume slew 2048 steps (171- ms volume ramp time at 48 kHz) |
– | – | – | – | – | 0 | 1 | 1 | Volume slew 256 steps (21-ms volume ramp time at 48 kHz) |
– | – | – | – | – | 1 | X | X | Reserved |