wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 170

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

WM8400
w
R20 (14h)
GPIO3 and
GPIO4
REGISTER
ADDRESS
15
14
13
12
11:8
7
6
5
4
3:0
BIT
GPIO4_DEB_ENA
GPIO4_IRQ_ENA
GPIO4_PU
GPIO4_PD
GPIO4_SEL
[3:0]
GPIO3_DEB_ENA
GPIO3_IRQ_ENA
GPIO3_PU
GPIO3_PD
GPIO3_SEL
[3:0]
LABEL
0b
0b
0b
1b
0000b
0b
0b
0b
1b
0000b
DEFAULT
GPIO4 Input De-Bounce
0 = disabled (Not de-bounced)
1 = enabled (Requires MCLK input and TOCLK_ENA=1)
GPIO4 IRQ Enable
0 = disabled
1 = enabled (GPIO4 input will generate IRQ)
GPIO4 Pull-Up Resistor Enable
0 = Pull-up disabled
1 = Pull-up enabled (Approx 150kΩ)
GPIO4 Pull-Down Resistor Enable
0 = Pull-down disabled
1 = Pull-down enabled (Approx 150kΩ)
GPIO4 Function Select
0000 = Input pin
0001 = Clock output (f=SYSCLK/OPCLKDIV)
0010 = Logic '0'
0011 = Logic '1'
0100 = FLL Lock output
0101 = Temperature OK output
0110 = Reserved
0111 = CODEC IRQ output
1000 = MIC Detect
1001 = MIC Short Circuit Detect
1010 = MIC Detect
1011 = MIC Short Circuit Detect
1100 to 1111 = Reserved
GPIO3 Input De-Bounce
0 = disabled (Not de-bounced)
1 = enabled (Requires MCLK input and TOCLK_ENA=1)
GPIO3 IRQ Enable
0 = disabled
1 = enabled (GPIO3 input will generate IRQ)
GPIO3 Pull-Up Resistor Enable
0 = Pull-up disabled
1 = Pull-up enabled (Approx 150kΩ)
GPIO3 Pull-Down Resistor Enable
0 = Pull-down disabled
1 = Pull-down enabled (Approx 150kΩ)
GPIO3 Function Select
0000 = Input pin
0001 = Clock output (f=SYSCLK/OPCLKDIV)
0010 = Logic '0'
0011 = Logic '1'
0100 = FLL Lock output
0101 = Temperature OK output
0110 = Reserved
0111 = CODEC IRQ output
1000 = MIC Detect
1001 = MIC Short Circuit Detect
1010 = MIC Detect
1011 = MIC Short Circuit Detect
1100 to 1111 = Reserved
DESCRIPTION
PP, April 2009, Rev 3.0
Pre-Production
170