WM9715L
Production Data
Registers 60h and 62h control the ALC and Noise Gate functions.
REG
ADDR
BIT
LABEL
ALCL
DEFAULT
DESCRIPTION
Controls ALC threshold
REFER TO
60h
62h
15:12
11:8
7:4
1011 (-12dB)
0000 (0 ms)
0011 (192 ms)
0010 (24 ms)
00 (OFF)
Audio ADC,
Automatic
Level Control
HLD
Controls ALC hold time
Controls ALC decay time
Controls ALC attack time
DCY
3:0
ATK
15:14
ALCSEL
Controls which channel ALC operates on. 00=none,
01=right only, 10=left only, 11=both
13:11
10:9
8
MAXGAIN
ZC TIMEOUT
ALCZC
111 (+30dB)
11 (slowest)
0 (OFF)
Controls upper gain limit for ALC
Controls time-out for zero-cross detection
Enables zero-cross detection for ALC
Enables noise gate function
7
NGAT
0 (OFF)
5
NGG
0 (hold gain)
00000 (-76.5dB)
Selects noise gate type. 0=hold gain, 1=mute
Controls noise gate threshold
4:0
NGTH
Register 64h controls the input signal of the auxiliary DAC.
REG
ADDR
BIT
15
LABEL
XSLE
DEFAULT
DESCRIPTION
REFER TO
64h
0
Selects input for AUXDAC. 0=from AUXDACVAL (for DC
signals), 1=from AC-Link slot (for AC signals)
Auxiliary DAC
14:12
11:0
AUXDACSLT
AUXDACVAL
000 (Slot 5)
000000000
Selects input slot for AUXDAC (with XSLE=1)
AUXDAC Digital Input for AUXDAC (with XSLE=0). 000h=
minimum, FFFh=full-scale
Registers 76h, 78h and 7Ah control the touchpanel interface.
REG
ADDR
BIT
15
LABEL
POLL
DEFAULT
DESCRIPTION
REFER TO
76h
0
Writing “1” starts a measurement (this bit resets itself)
Selects measurement type
Touchpanel
Interface
14:12
11
ADCSEL
COO
CTC
000 (none)
0 (OFF)
0 (polling)
00 (93.75Hz)
0000 (20.8µs)
1
Enables co-ordinate mode
10
Enables continuous conversions
9:8
7:4
3
CR
Controls conversion rate in continuous mode
Controls touchpanel settling time
DEL
SLEN
SLT
Enables slot readback of touchpanel data
Selects time slot for readback of touchpanel data
2:0
15:14
10
78h
PRP
00
Selects mode of operation. 00=OFF, 01=pen detect with
wake-up, 10=pen detect without wake-up, 11=running
13
RPR
0
Selects wake-up mode. 0=AC-Link only, 1=AC-Link and
WM9715L auto-wake-up
12
11
45W
0 (4-wire)
0 (always)
Selects 4-wire or 5-wire touchpanel
PDEN
Selects when touchpanel measurements take place.
0=always, 1=only when pen is down
9
WAIT
0
Controls data readback from register 7Ah. 0=overwrite old
data with new, 1=wait until old data has been read
8
PIL
0 (200µA)
000001 (68kΩ)
0 (pen up)
000 (none)
000h
Controls current used for pressure measurement. 1=400µA
Controls internal pull-up resistor for pen-down detection
Indicates pen status.
5:0
15
RPU
7Ah
PNDN
ADCSRC
ADCD
read
only
14:12
11:0
Indicates measurement type
Returns data from touchpanel / AUXADC
PD Rev 4.0 December 2007
70
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
