wm9715l Wolfson Microelectronics plc, wm9715l Datasheet - Page 70

• Manufacturer Part Number: wm9715l
• Description: Ac?97 Audio And Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

WM9715L
w
60h
62h
64h
76h
78h
7Ah
read
only
ADDR
ADDR
ADDR
Registers 60h and 62h control the ALC and Noise Gate functions.
Register 64h controls the input signal of the auxiliary DAC.
Registers 76h, 78h and 7Ah control the touchpanel interface.
REG
REG
REG
15:12
11:8
7:4
3:0
15:14
13:11
10:9
8
7
5
4:0
15
14:12
11:0
15
14:12
11
10
9:8
7:4
3
2:0
15:14
13
12
11
9
8
5:0
15
14:12
11:0
BIT
BIT
BIT
ALCL
HLD
DCY
ATK
ALCSEL
MAXGAIN
ZC TIMEOUT
ALCZC
NGAT
NGG
NGTH
XSLE
AUXDACSLT
AUXDACVAL
POLL
ADCSEL
COO
CTC
CR
DEL
SLEN
SLT
PRP
RPR
45W
PDEN
WAIT
PIL
RPU
PNDN
ADCSRC
ADCD
LABEL
LABEL
LABEL
0
000 (none)
0 (OFF)
0 (polling)
00 (93.75Hz)
0000 (20.8µs)
1
10
00
0
0 (4-wire)
0 (always)
0
0 (200µA)
000001 (68kΩ)
0 (pen up)
000 (none)
000h
DEFAULT
1011 (-12dB)
0000 (0 ms)
0011 (192 ms)
0010 (24 ms)
00 (OFF)
111 (+30dB)
11 (slowest)
0 (OFF)
0 (OFF)
0 (hold gain)
00000 (-76.5dB)
0
000 (Slot 5)
000000000
DEFAULT
DEFAULT
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
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
WM9715L 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=400µA
Controls internal pull-up resistor for pen-down detection
Indicates pen status.
Indicates measurement type
Returns data from touchpanel / AUXADC
Controls ALC threshold
Controls ALC hold time
Controls ALC decay time
Controls which channel ALC operates on. 00=none,
01=right only, 10=left only, 11=both
Controls upper gain limit for ALC
Controls time-out for zero-cross detection
Enables zero-cross detection for ALC
Enables noise gate function
Selects noise gate type. 0=hold gain, 1=mute
Controls noise gate threshold
Controls ALC attack time
DESCRIPTION
DESCRIPTION
DESCRIPTION
PD Rev 4.0 December 2007
Production Data
Audio ADC,
Automatic
Level Control
Auxiliary DAC
REFER TO
REFER TO
Touchpanel
Interface
REFER TO
70