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參數(shù)資料
| 型號： | WM9712LEFL |
| 廠商： | Wolfson Microelectronics |
| 元件分類： | Codec |
| 英文描述： | AC97 Audio and Touchpanel CODEC |
| 中文描述： | AC97音頻編解碼器和觸摸屏 |
| 文件頁數(shù)： | 32/78頁 |
| 文件大小： | 689K |
| 代理商： | WM9712LEFL |
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WM9712L
PHONE OUTPUT (MONOOUT)
Production Data
w
PD Rev 4.0 December 2003
32
The MONOOUT output (pin 33) is intended for connection to the TX side of a wireless chipset. The
signal is generated in a dedicated mono mixer; it is not necessarily a mono mix of the stereo outputs
HPOUTL/R or LOUT2/ROUT2 (see “Audio Mixers” section).
The MONOOUT volume can be controlled by writing to register 06h. When MONOOUT is not used,
the output buffer can be disabled to save power (see “Power Management” section). The MONOOUT
pin remains at the same DC level (the reference voltage on the VREF pin), so that no click noise is
produced when muting or un-muting.
REGISTER
ADDRESS
06h
MONOOUT
Volume
BIT
LABEL
DEFAULT
DESCRIPTION
15
MUTE
1
Mute MONOOUT
1: Mute
0: No Mute
Zero Cross Enable
0: Change gain immediately
1: Change gain only on zero crossings,
or after time-out
MONOOUT Volume
00000: 0dB (maximum)
00001: -1.5dB
… (1.5dB steps)
11111: -46.5dB
7
ZC
0
4:0
MONOOUT
VOL
00000
(0dB)
Table 18 MONOOUT Control
THERMAL SENSOR
The speaker and headphone outputs can drive very large currents. To protect the WM9712L from
becoming too hot, a thermal sensor has been built in. If the chip temperature reaches approximately
150
°
C, and the ENT bit is set, the WM9712L 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).
REGISTER
ADDRESS
5Ch
BIT
LABEL
DEFAULT
DESCRIPTION
2
ENT
0
Enable thermal sensor
0: Disabled
1: Enabled
Thermal sensor (virtual GPIO)
1: Temperature below 150
°
C
0: Temperature above 150
°
C
See also “GPIO and Interrupt Control” section.
54h
11
TI
1
Table 19 Thermal Cutout Control
相關PDF資料 |
PDF描述 |
|---|---|
| WM9712LEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFL | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFT | AC97 Audio and Touchpanel CODEC |
| WM9712LSEFV | AC97 Audio and Touchpanel CODEC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| WM9712LEFL/RV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFL/V | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFT | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFT/RV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
| WM9712LEFV | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC |
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