WM9714L_06 WOLFSON [Wolfson Microelectronics plc], WM9714L_06 Datasheet - Page 34

• Manufacturer Part Number: WM9714L_06
• Description: AC 97 Audio CODEC
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM9714L
AUXILIARY DAC
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AUXDAC is a simple 12-bit mono DAC. It can be used to generate DC signals (with the numeric input
written into a control register), or AC signals such as telephone-quality ring tones or system beeps
(with the input signal supplied through an AC-Link slot). In AC mode (XSLE = 1), the input data is
binary offset coded; in DC mode (XSLE = 0), there is no offset.
The analogue output of AUXDAC is routed directly into the output mixers. The signal gain into each
mixer can be adjusted at the mixer inputs using control register 12h. In slot mode (XSLE = 1), the
AUXDAC also supports variable sample rates (See “Variable Rate Audio” section).
When not in use the auxillary DAC can be powered down using the Powerdown register bit AUXDAC
(register 3Ch, bit 11).
Table 20 AUXDAC Control
3Ch
Powerdown (1)
64h
AUXDAC Input
Control
1Ah
AUXDAC Output
Control
REGISTER
ADDRESS
11
15
14:12
11:0
15
14:12
11
10:8
7
6:4
BIT
AUXDAC
XSLE
AUXDAC
SLT
AUXDAC
VAL
A2H
A2HVOL
A2S
A2SVOL
A2M
A2MVOL
LABEL
0
0
000
000h
1
010
(0dB)
1
010
(0dB)
1
010
(0dB)
DEFAULT
AUXDAC powerdown
1: OFF, 0: ON
AUXDAC input selection
0: from AUXDACVAL (for DC signals)
1: from AC-Link slot selected by
AUXDACSLT (for AC signals)
AUXDAC Input Selection
000 – Slot 5, bits 8-19 (with XSLE=1)
001 – Slot 6, bits 8-19 (with XSLE=1)
010 – Slot 7, bits 8-19 (with XSLE=1)
011 – Slot 8, bits 8-19 (with XSLE=1)
100 – Slot 9, bits 8-19 (with XSLE=1)
101 – Slot 10, bits 8-19 (with XSLE=1)
110 – Slot 11, bits 8-19 (with XSLE=1)
111 – RESERVED (do not use)
AUXDAC Digital Input (with XSLE=0)
000h: minimum
FFFh: full-scale
Mute AUXDAC path to headphone
mixer
1: Mute, 0: No mute (ON)
AUXDAC to headphone mixer gain
000: +6dB
… (3dB steps)
111: -15dB
Mute AUXDAC path to speaker mixer
1: Mute, 0: No mute (ON)
AUXDAC to speaker mixer gain
000: +6dB
… (3dB steps)
111: -15dB
Mute AUXDAC path to mono mixer
1: Mute, 0: No mute (ON)
AUXDAC to mono mixer gain
000: +6dB
… (3dB steps)
111: -15dB
DESCRIPTION
PP Rev 3.0 June 2006
Pre-Production
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