WM9712L_11 Datasheet, PDF (68/78 Pages) Wolfson Microelectronics plc – AC’97 Audio and Touchpanel CODEC

WM9712L
Register 3Ah controls the SPDIF output.
Production Data
REG BIT
ADDR
3Ah
15
LABEL
V
14
DRS
13:12 SPSR
11
L
10:4
CC
3
PRE
2
COPY
1
AUDIB
0
PRO
DEFAULT
0
0
10
0
0000000
0
0
0
0
DESCRIPTION
REFER TO
Validity bit; ‘0’ indicates frame valid, ‘1’ indicates frame not
valid
Indicates that the WM9712L does not support double rate
SPDIF output (read-only)
Indicates that the WM9712L only supports 48kHz sampling
on the SPDIF output (read-only)
Generation level; programmed as required by user
Category code; programmed as required by user
Pre-emphasis; ‘0’ indicates no pre-emphasis, ‘1’ indicates
50/15us pre-emphasis
Copyright; ‘0’ indicates copyright is not asserted, ‘1’
indicates copyright
Non-audio; ‘0’ indicates data is PCM, ‘1’ indicates non-
PCM format (e.g. DD or DTS)
Professional; ‘0’ indicates consumer, ‘1’ indicates
professional
Digital Audio
(SPDIF)
Output
Register 4Ch to 54h control the GPIO pins and virtual GPIO signals.
REG BIT
ADDR
4Ch
4Eh
50h
52h
54h
15
14
13
12
11
10-6
5
4
3
2
1
LABEL DEFAULT
DESCRIPTION
REFER TO
please
refer to
the
register
map
all 1 (all inputs)
except unused
bits
all 1
all 0 (not sticky)
all 0 (OFF)
= status of GPIO
inputs
Controls GPIO configuration as inputs or as outputs (note:
virtual GPIOs can only be inputs)
Controls GPIO polarity (actual polarity depends on register
4Ch AND register 4Eh)
Makes GPIO signals sticky
Enables wake-up for each GPIO signal
GPIO pin status (read from inputs, write ‘0’ to clear sticky bits)
Controls Comparator 1 signal (virtual GPIO)
Controls Comparator 2 signal (virtual GPIO)
Controls Pen-Down Detector signal (virtual GPIO)
Controls ADA signal (virtual GPIO)
Controls Thermal sensor signal (virtual GPIO)
Unused
Controls GPIO5 (pin 48)
Controls GPIO4 (pin 47)
Controls GPIO3 (pin 46)
Controls GPIO2 (pin 45)
Controls GPIO1 (pin 44)
GPIO and
Interrupt
Control
Register 56h controls the use of GPIO pins for non-GPIO functions.
REG BIT
ADDR
56h
5
4
3
2
LABEL DEFAULT
GE5
GE4
GE3
GE2
1 (GPIO)
1 (GPIO)
1 (GPIO)
1 (GPIO)
DESCRIPTION
Selects between GPIO5 and SPDIF_OUT function for pin 48
Selects between GPIO4 and ADA/MASK functionS for pin 47
Selects between GPIO3 and PENDOWN function for pin 46
Selects between GPIO2 and IRQ function for pin 45
REFER TO
GPIO and
Interrupt
Control
w
PD, Rev 4.6, November 2011
68