wm9712l Wolfson Microelectronics plc, wm9712l Datasheet - Page 68

• Manufacturer Part Number: wm9712l
• Description: Ac?97 Audio And Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

WM9712L
w
3Ah
4Ch
4Eh
50h
52h
54h
56h
ADDR
ADDR
ADDR
Register 3Ah controls the SPDIF output.
Register 4Ch to 54h control the GPIO pins and virtual GPIO signals.
Register 56h controls the use of GPIO pins for non-GPIO functions.
REG
REG
REG
15
14
13:12
11
10:4
3
2
1
0
15
14
13
12
11
10-6
5
4
3
2
1
5
4
3
2
BIT
BIT
BIT
V
DRS
SPSR
L
CC
PRE
COPY
AUDIB
PRO
GE5
GE4
GE3
GE2
LABEL
LABEL
please
refer to
the
register
map
LABEL
1 (GPIO)
1 (GPIO)
1 (GPIO)
1 (GPIO)
DEFAULT
all 1 (all inputs)
except unused
bits
all 1
all 0 (not sticky)
all 0 (OFF)
= status of GPIO
inputs
0
0
10
0
0000000
0
0
0
0
DEFAULT
DEFAULT
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
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
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)
DESCRIPTION
DESCRIPTION
DESCRIPTION
PD Rev 4.5 August 2006
Production Data
Digital Audio
(SPDIF)
Output
GPIO and
Interrupt
Control
REFER TO
REFER TO
REFER TO
GPIO and
Interrupt
Control
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