WM9712CLGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM9712CLGEFL/RV Datasheet - Page 70

• Manufacturer Part Number: WM9712CLGEFL/RV
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM9712L
w
REG
ADDR
64h
REG
ADDR
76h
78h
7Ah
read
only
REG
ADDR
7Ch
7Eh
Register 64h controls the input signal of the auxiliary DAC.
Registers 76h, 78h and 7Ah control the touchpanel interface.
Register 7Ch and 7Eh are read-only registers that indicate to the driver that the CODEC is a WM9712L.
BIT
15
14:12
11:0
BIT
15
14:12
11
10
9:8
7:4
3
2:0
15:14
13
12
11
9
8
7:6
5:0
15
14:12
11:0
BIT
15:8
7:0
15:8
7:0
LABEL
XSLE
AUXDACSLT
AUXDACVAL
LABEL
POLL
ADCSEL
COO
CTC
CR
DEL
SLEN
SLT
PRP
RPR
45W
PDEN
WAIT
PIL
MSK
RPU
PNDN
ADCSRC
ADCD
LABEL
F7:0
S7:0
T7:0
REV7:0
DEFAULT
57h
4Dh
4Ch
12h
DEFAULT
0
000 (none)
0 (OFF)
0 (polling)
00 (93.75Hz)
0000 (20.8s)
1
10
00
0
0 (4-wire)
0 (always)
0
0 (200A)
00 (OFF)
000001 (64k)
0 (pen up)
000 (none)
000h
0
000 (Slot 5)
000000000
DEFAULT
DESCRIPTION
ASCII character “W” for Wolfson
ASCII character “M”
ASCII character “L”
12 for WM9712L
DESCRIPTION
Selects input for AUXDAC. 0=from AUXDACVAL (for DC
signals), 1=from AC-Link slot (for AC signals)
Selects input slot for AUXDAC (with XSLE=1)
AUXDAC Digital Input for AUXDAC (with XSLE=0). 000h=
minimum, FFFh=full-scale
DESCRIPTION
Writing “1” starts a measurement (this bit resets itself)
Selects measurement type
Enables co-ordinate mode
Enables continuous conversions
Controls conversion rate in continuous mode
Controls touchpanel settling time
Enables slot readback of touchpanel data
Selects time slot for readback of touchpanel data
Selects mode of operation. 00=OFF, 01=pen detect with wake-
up, 10=pen detect without wake-up, 11=running
Selects wake-up mode. 0=AC-Link only, 1=AC-Link and
WM9712L auto-wake-up
Selects 4-wire or 5-wire touchpanel
Selects when touchpanel measurements take place. 0=always,
1=only when pen is down
Controls data readback from register 7Ah. 0=overwrite old data
with new, 1=wait until old data has been read
Controls current used for pressure measurement. 1=400A
Controls MASK feature
Controls internal pull-up resistor for pen-down detection
Indicates pen status.
Indicates measurement type
Returns data from touchpanel / AUXADC
PD, Rev 4.6, November 2011
Production Data
REFER TO
Auxiliary DAC
REFER TO
Intel’s AC’97
Component
Specification,
Revision 2.2,
page 50
REFER TO
Touchpanel
Interface
70