Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

Preview PDF HTML

WM9712L Datasheet(PDF) 45 Page - Wolfson Microelectronics plc

Part # WM9712L
Description  AC97 Audio and Touchpanel CODEC
PDF  77 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9712L Datasheet(HTML) 45 Page - Wolfson Microelectronics plc

Back Button WM9712L Datasheet HTML 41Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 42Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 43Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 44Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 45Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 46Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 47Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 48Page - Wolfson Microelectronics plc WM9712L Datasheet HTML 49Page - Wolfson Microelectronics plc Next Button
Zoom Inzoom in Zoom Outzoom out
 45 / 77 page
background image
Production Data
WM9712L
w
PD Rev 4.5 August 2006
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
BIT
LABEL
DEFAULT
DESCRIPTION
3
SLEN
0
Slot Readback Enable
0: Disabled (readback through register only)
1: Enable (readback slot selected by SLT)
76h
2:0
SLT
110
AC’97 Slot Selection for Touchpanel Data
000: Slot 5
001: Slot 6
…
101: Slot 10
110: Slot 11
111: RESERVED
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
BIT
LABEL
DEFAULT
DESCRIPTION
76h
7:4
DEL
0000
(1 frame)
Touchpanel ADC Settling Time
Table 31 Touchpanel Settling Time Control (1)
DEL
DELAY
(AC-LINK FRAMES)
DELAY
(TIME)
0000
1
20.8
µs
0001
2
41.7
µs
0010
4
83.3
µs
0011
8
167
µs
0100
16
333
µs
0101
32
667
µs
0110
48
1ms
0111
64
1.33ms
1000
96
2ms
1001
128
2.67ms
1010
160
3.33ms
1011
192
4ms
1100
224
4.67ms
1101
256
5.33ms
1110
288
6ms
1111
No delay, switch matrix always on
Table 32 Touchpanel Settling Time Control (2)
The total time for co-ordinate or auxiliary measurements to complete is the delay time DEL, plus one
AC-Link frame (20.8
µs). For a pressure measurement, the time taken is DEL plus two AC-Link
frames (41.6
µs).



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com