W681307DG Datasheet, PDF (86/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM.

W681307
12.3.18
SideToneChannel_Ena
Address
0x14AF
Access Mode Value At Reset Nominal Value
R/W
0x01
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED RESERVED RESERVED RESERVED SideTone_ch3 SideTone_ch2 SideTone_ch1 SideTone_ch0
The register can enable side tone individually for the each active pcm channel.
12.3.19
Connect3 ~ ToneEna3
Address
Access Mode Value At Reset Nominal Value
0x14B0 ~ 0x14BC
R/W
0x00
The functions are the same as channel 0.
12.4
PCM Mixer Matrix
The registers Connect0-3 specify channels which should be connected together and enable the corresponding PCM channels. The
connection registers of each specified PCM channels can be set to the same value simultaneously. The result is the same that one of each
registers be set. For example, The PCM0 and PCM1 channels need to be connected. So the 1480 and 1490 can be set to 31. The effect is
the same that only 1480 or 1490 is set.
12.5
Gain Tables
There are four gain functions in this block: PCM I/O gain, side tone gain and tone gain (level).
Table 12-1 The PCM Input gain is provided to allow minor corrections for board-level analogue gain problems. The 4-bit numbers allow
+/- 10 dB adjustments and hard mute.
InputGain (3:0)
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
Nominal gain
0 dB
+1 dB
+2 dB
+3 dB
+4 dB
+6 dB
+8 dB
+10 dB
-∞ (Hard mute)
-10 dB
-8 dB
-6 dB
-4 dB
-3 dB
-2 dB
-1 dB
- 86 -
Actual gain
0 dB
+1.0
+2.0
+2.8
+4.2
+6.0
+8.0
+9.5
-∞
-10.1
-8.5
-6.0
-4.1
-3.2
-1.8
-1.2
Publication Release Date: May, 2007
Revision 1.3