W681307 Datasheet, PDF (115/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM

W681307
14.8
PO Gain Register
Address
0x1508
Access Mode
R/W
Value At Reset
0x88
Nominal Value
Bit 7
PO2_PD
Bit 6
PO2Gain [2]
Bit 5
PO2Gain [1]
Bit 4
PO2Gain [0]
Bit 3
PO1_PD
Bit 2
PO1Gain [2]
Bit 1
PO1Gain [1]
Bit 0
PO1Gain [0]
The gains of PO1 and PO2 op amp are set according to this register value. The maximum driving capability of PO1 is 120Ω and PO2 is
16Ω. The PO1 and PO2 can be power down by the corresponding control bits of PO Gain register.
Note that the PO op amps can be also power down by the CODEC_CTRL register (0x1509).
The PO amplifier gain table is listed as below.
PO1 Gain [3:0]
Bin
Hex
0000
0
0001
1
0010
2
0011
3
0100
4
0101
5
0110
6
0111
7
1xxx
Gain [dB]
0 dB
2 dB
4 dB
6 dB
8 dB
10 dB
-2 dB
-4 dB
Disable
PO2 Gain [7:4]
Bin
Hex
0000
0
0001
1
0010
2
0011
3
0100
4
0101
5
0110
6
0111
7
1xxx
Gain [dB]
0 dB
2 dB
4 dB
6 dB
8 dB
10 dB
-2 dB
-4 dB
Disable
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Publication Release Date: May, 2007
Revision 1.3