參數(shù)資料
型號： WM9712LSEFV
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)： 47/78頁
文件大?。?/td> 689K
代理商： WM9712LSEFV
Production Data
WM9712L
w
PD Rev 4.0 December 2003
47
AUXILIARY ADC INPUTS
The ADC used for touchpanel digitisation can also be used for auxiliary measurements, provided that
it is enabled (register 78h, PRP = 11). The WM9712L has four pins that can be used as auxiliary
ADC inputs:
COMP1 / AUX1 (pin 29)
COMP2 / AUX2 (pin 30)
BMON / AUX3 (pin 31)
WIPER / AUX4 (pin 12)
Note that pin 12 connects to the wiper of a 5-wire touchpanel wiper function. Auxiliary measurements
taken on pin 12 are only meaningful when it is not connected to a touchpanel (i.e. a 4-wire
touchpanel, or no touchpanel at all, is used). Pins 29 and 30 are also used as comparator inputs (see
Battery Alarm and Battery Measurement), but auxiliary measurements can still be taken on these
pins at any time. For the use of pin 31 see the “Battery Alarm And Battery Measurement” section,
note that the measured value from the BMON/AUX3 pin will be 1/3 of the actual value due to the
potential divider on this pin. The ADCSEL control bits select between different ADC inputs, as shown
below.
REGISTER
ADDRESS
76h
Touchpanel
Digitiser
Control
BIT
LABEL
DEFAULT
DESCRIPTION
14:12
ADCSEL
000
Touchpanel ADC Input Selector
000: No measurement
001-011: Touchpanel measurement (please
refer to Touchpanel Digitiser section)
100: COMP1 / AUX1 measurement (pin 29)
101: COMP2 AUX2 measurement (pin 30)
110: BMON / AUX3 measurement (pin 31)
111: WIPER / AUX 4 measurement (pin 12)
Table 34 Auxiliary ADC Measurements
Auxiliary ADC measurements are initiated in the same way as touchpanel measurements, and the
data is returned in the same manner. Please refer to the “Controlling the Touchpanel Interface”
section.
BATTERY MEASUREMENT USING THE BMON/AUX3 PIN
BMON/AUX3 (pin 31) has the capability to take inputs up to 5 volts (Assuming AVDD=3.3V) by
dividing down the input signal. The internal potential divider has a total resistance of 30k
. However,
it is only connected to the pin when an AUX3 measurement is requested, and remains connected for
the duration of one AC-Link frame (20.83
μ
s, assuming a 24.576MHz clock crystal is used). The
effective input impedance of BMON/AUX3 is therefore given by:
R
BMON
= 30k
×
48kHz / [BMON sampling rate]
For example, if BMON is sampled ten times per second, the effective input resistance is 30k
×
48kHz / 10Hz = 144M
.
相關PDF資料
PDF描述
WME128K8-XXX 128Kx8 CMOS MONOLITHIC EEPROM, SMD 5962-96796
WME128K8 128Kx8 CMOS Monolithic EEPROM(128Kx8 CMOS單片EEPROM)
WMF128K8-50CLM5 128Kx8 MONOLITHIC FLASH, SMD 5962-96690
WMF128K8-50CLQ5A 128Kx8 MONOLITHIC FLASH, SMD 5962-96690
WMF128K8-50CM5 128Kx8 MONOLITHIC FLASH, SMD 5962-96690
相關代理商/技術參數(shù)
參數(shù)描述
WM9713 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC 97 AUDIO + TOUCHPANEL CODEC
WM9713-6123-FL48-M 功能描述:接口—CODEC WM9713EVM MINI EVAL RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
WM9713-6123-FL48-M-S 功能描述:接口—CODEC WM9713EVM FULL EVAL SYSTEM RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
WM9713CLGEFL/RV 功能描述:接口—CODEC Stereo AC’97 CODEC, T/P INTERFACE RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
WM9713CLGEFL/V 功能描述:接口—CODEC Stereo AC’97 CODEC, T/P INTERFACE RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*