wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 94
wm8903
Manufacturer Part Number
wm8903
Description
Ultra Low Power Codec For Portable Audio Applications
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8903.pdf
(158 pages)
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WM8903
w
R119 (77h)
GPIO Control
4
R120 (78h)
GPIO Control
5
REGISTER
ADDRESS
13:8
13:8
BIT
0
7
6
5
4
3
2
1
0
7
6
5
GP3_DB
GP4_FN[5:0]
GP4_DIR
GP4_OP_CFG
GP4_IP_CFG
GP4_LVL
GP4_PD
GP4_PU
GP4_INTMODE
GP4_DB
GP5_FN[5:0]
GP5_DIR
GP5_OP_CFG
GP5_IP_CFG
LABEL
DEFAULT
00_0010
00_0001
0
0
0
1
0
0
0
0
0
1
0
1
GPIO de-bounce
0 = GPIO is not debounced
1 = GPIO is debounced
GPIO 4 Pin Function select
00h = GPIO output
01h = Reserved
02h = IRQ output
03h = GPIO input
04h = MICBIAS Current detect
05h = MICBIAS Short Circuit detect
06h 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
GPIO Output Level
(when GP4_FN = 00000)
0 = Logic 0
1 = Logic 1
GPIO Pull-Down Enable
0 = Pull-down disabled
1 = Pull-down enabled (Approx 100kΩ)
GPIO Pull-Up Enable
0 = Pull-up disabled
1 = Pull-up enabled (Approx 100kΩ)
GPIO Interrupt Mode
0 = Level triggered
1 = Edge triggered
GPIO de-bounce
0 = GPIO is not debounced
1 = GPIO is debounced
GPIO 5 Pin Function select
00h = GPIO output
01h = BCLK
02h = IRQ output
03h = GPIO input
04h = MICBIAS Current detect
05h = MICBIAS Short Circuit detect
06h 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
PP, Rev 3.1, August 2009
DESCRIPTION
Pre-Production
94