WM8903 Datasheet, PDF (164/178 Pages) Wolfson Microelectronics plc – Ultra Low Power CODEC for Portable Audio Applications

WM8903
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0Ah to 3Fh = Reserved
7
GP2_DIR
1
GPIO Pin Direction
0 = Output
1 = Input
6 GP2_OP_CFG
0
Output pin configuration
0 = CMOS
1 = Open-drain
5
GP2_IP_CFG
1
Input pin configuration
0 = Active low
1 = Active high
4
GP2_LVL
0
GPIO Output Level
(when GP2_FN = 00000)
0 = Logic 0
1 = Logic 1
3
GP2_PD
1
GPIO Pull-Down Enable
0 = Pull-down disabled
1 = Pull-down enabled (Approx 100kΩ)
2
GP2_PU
0
GPIO Pull-Up Enable
0 = Pull-up disabled
1 = Pull-up enabled (Approx 100kΩ)
1 GP2_INTMODE
0
GPIO Interrupt Mode
0 = Level triggered
1 = Edge triggered
0
GP2_DB
0
GPIO de-bounce
0 = GPIO is not debounced
1 = GPIO is debounced
Register 75h GPIO Control 2
REGISTER BIT
ADDRESS
R118 (76h)
13:8
GPIO Control
3
7
6
5
LABEL
DEFAULT
DESCRIPTION
GP3_FN [5:0]
GP3_DIR
GP3_OP_CFG
GP3_IP_CFG
00_0000
1
0
1
GPIO 3 Pin Function select
00h = GPIO output
01h = Reserved
02h = IRQ output
03h = GPIO input
04h = MICBIAS Current detect
05h = MICBIAS Short Circuit detect
06h = Reserved
07h = Reserved
08h = FLL Lock output
09h = FLL Clock output
0Ah to 3Fh = Reserved
GPIO Pin Direction
0 = Output
1 = Input
Output pin configuration
0 = CMOS
1 = Open-drain
Input pin configuration
0 = Active low
1 = Active high
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Production Data
PD, Rev 4.5, June 2012
164