參數(shù)資料
型號： WM9712LEFV
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)： 45/78頁
文件大?。?/td> 689K
代理商： WM9712LEFV
Production Data
WM9712L
w
PD Rev 4.0 December 2003
45
If the SLEN bit is set to ‘1’, then the touchpanel data appears on the AC-Link slot selected by the
SLT control bits, as shown below. The Slot 0 ‘tag’ bit corresponding to the selected time slot is
asserted whenever there is new data on that slot.
REGISTER
ADDRESS
76h
BIT
LABEL
DEFAULT
DESCRIPTION
3
SLEN
0
Slot Readback Enable
0: Disabled (readback through register only)
1: Enable (readback slot selected by SLT)
AC’97 Slot Selection for Touchpanel Data
000: Slot 5
001: Slot 6
…
101: Slot 10
110: Slot 11
111: RESERVED
2:0
SLT
110
Table 30 Returning Touchpanel Data Through an AC-Link Time Slot
TOUCHPANEL SETTLING TIME
For accurate touchpanel measurements, some settling time may be required between the switch
matrix applying a voltage across the touchpanel plate and the ADC sampling the signal. This time
delay function is built into the WM9712L and can be programmed as shown below.
REGISTER
ADDRESS
76h
BIT
LABEL
DEFAULT
DESCRIPTION
7:4
DEL
0000
(1 frame)
Touchpanel ADC Settling Time
Table 31 Touchpanel Settling Time Control (1)
DEL
DELAY
(AC-LINK FRAMES)
1
2
4
8
16
32
48
64
96
128
160
192
224
256
288
No delay, switch matrix always on
Table 32 Touchpanel Settling Time Control (2)
DELAY
(TIME)
20.8
μ
s
41.7
μ
s
83.3
μ
s
167
μ
s
333
μ
s
667
μ
s
1ms
1.33ms
2ms
2.67ms
3.33ms
4ms
4.67ms
5.33ms
6ms
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
The total time for co-ordinate or auxiliary measurements to complete is the delay time DEL, plus one
AC-Link frame (20.8
μ
s). For a pressure measurement, the time taken is DEL plus two AC-Link
frames (41.6
μ
s).
相關PDF資料
PDF描述
WM9712LSEFL AC97 Audio and Touchpanel CODEC
WM9712LSEFT AC97 Audio and Touchpanel CODEC
WM9712LSEFV AC97 Audio and Touchpanel CODEC
WME128K8-XXX 128Kx8 CMOS MONOLITHIC EEPROM, SMD 5962-96796
WME128K8 128Kx8 CMOS Monolithic EEPROM(128Kx8 CMOS單片EEPROM)
相關代理商/技術參數(shù)
參數(shù)描述
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WM9712LGEFL/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
WM9712LSEFL 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC
WM9712LSEFL/RV 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC
WM9712LSEFL/V 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:AC97 Audio and Touchpanel CODEC
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