SLASEG6B May 2018 – June 2020 TAS3251
PRODUCTION DATA.
A basic DAC digital gain control with range between 24 dB and –103 dB and mute is available on each channels by P0-R61-D[7:0] for SPK_OUTB± and P0-R62-D[7:0] for SPK_OUTA±. These volume controls all have 0.5 dB step programmability over most gain and attenuation ranges. Table 12 lists the detailed gain versus programmed setting for the basic volume control. Volume can be changed for both SPK_OUTB± and SPK_OUTA± at the same time or independently by P0-R61-D[1:0] . When D[1:0] set 00 (default), independent control is selected. When D[1:0] set 01, SPK_OUTA± accords with SPK_OUTB± volume. When D[1:0] set 10, SPK_OUTA± volume controls the volume for both channels. To set D[1:0] to 11 is prohibited.
GAIN SETTING | BINARY DATA | GAIN (dB) | COMMENTS |
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0 | 0000-0000 | 24.0 | Positive maximum |
1 | 0000-0001 | 23.5 | |
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46 | 0010-1110 | 1.0 | |
47 | 0010-1111 | 0.5 | |
48 | 0011-0000 | 0.0 | No attenuation (default) |
49 | 0011-0001 | –0.5 | |
50 | 0011-0010 | –1.0 | |
51 | 0011-0011 | –1.5 | |
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253 | 1111-1101 | –102.5 | |
254 | 1111-1110 | –103 | Negative maximum |
255 | 1111-1111 | –![]() |
Negative infinite (Mute) |
Ramp-up frequency and ramp-down frequency can be controlled by P0-R63, D[7:6] and D[3:2] as shown in Table 13. Also ramp-up step and ramp-down step can be controlled by P0-R63, D[5:4] and D[1:0] as shown in Table 14.
RAMP UP SPEED | EVERY N fS | COMMENTS | RAMP DOWN FREQUENCY | EVERY N fS | COMMENTS |
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00 | 1 | Default | 00 | 1 | Default |
01 | 2 | 01 | 2 | ||
10 | 4 | 10 | 4 | ||
11 | Direct change | 11 | Direct change |
RAMP UP STEP | STEP dB | COMMENTS | RAMP DOWN STEP | STEP dB | COMMENTS |
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00 | 4.0 | 00 | –4.0 | ||
01 | 2.0 | 01 | –2.0 | ||
10 | 1.0 | Default | 10 | –1.0 | Default |
11 | 0.5 | 11 | –0.5 |