WM9714L_06 WOLFSON [Wolfson Microelectronics plc], WM9714L_06 Datasheet - Page 49

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

Pre-Production
THERMAL SENSOR
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Table 39 OUT3 / OUT4 PGA Control
The speaker and headphone outputs can drive very large currents. To protect the WM9714L from
becoming too hot, a thermal sensor has been built in. If the chip temperature reaches approximately
150 C, and the TI bit is set, the WM9714L deasserts GPIO bit 11 in register 54h, a virtual GPIO that
can be set up to generate an interrupt to the CPU (see “GPIO and Interrupt Control” section).
Table 40 Thermal Cutout Control
06h
Speaker
Volume
3Ch
54h
REGISTER
ADDRESS
REGISTER
ADDRESS
13
11
BIT
15
14
13:8
7
6
5:0
BIT
TSHUT
TI
LABEL
MU4
ZC4
OUT4VOL
MU3
ZC3
OUT3VOL
LABEL
1
0
DEFAULT
1 (Mute)
0
000000
(0dB)
1 (Mute)
0
000000
(0dB)
DEFAULT
Power down thermal sensor
0: Enabled
1: Disabled
Thermal sensor (virtual GPIO)
1: Temperature below 150 C
0: Temperature above 150 C
See also “GPIO and Interrupt Control” section.
Mute OUT4
1: Mute (OFF)
0: No Mute (ON)
OUT4 zero cross enable
0: Change gain immediately
1: Change gain only on zero crossings,
or after time-out
OUT4 Volume
000000: 0dB (maximum)
000001: -1.5dB
… (1.5dB steps)
011111: -46.5dB
1xxxxx: -46.5dB
Mute OUT3
1: Mute (OFF)
0: No Mute (ON)
OUT3 zero cross enable
0: Change gain immediately
1: Change gain only on zero crossings,
or after time-out
OUT3 Volume
Similar to OUT4VOL
DESCRIPTION
DESCRIPTION
PP Rev 3.0 June 2006
WM9714L
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