wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 99

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

w
Pre-Production
The interrupt bits are latched once set; they are reset by writing a logic ‘1’ to the applicable
GPIO_STATUS register bits. De-bouncing is provided in order to avoid false event triggers. Note that
TOCLK must be enabled when this input de-bouncing is required.
REGISTER
ADDRESS
R18 (12h)
R19 (13h)
R20 (14h)
R21 (15h)
R22 (16h)
7:0
15
14
13
12
11:8
7
6
5
4
3:0
15
14
13
12
11:8
7
6
5
4
3:0
15
14
13
12
11:8
7
6
5
4
3:0
7
6
4
3
2
0
BIT
GPIO_STATUS [7:0]
(rr)
GPIO2_DEB_ENA
GPIO2_IRQ_ENA
GPIO2_PU
GPIO2_PD
GPIO2_SEL[3:0]
GPIO1_DEB_ENA
GPIO1_IRQ_ENA
GPIO1_PU
GPIO1_PD
GPIO1_SEL[3:0]
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]
GPIO6_DEB_ENA
GPIO6_IRQ_ENA
GPIO6_PU
GPIO6_PD
GPIO6_SEL[3:0]
GPIO5_DEB_ENA
GPIO5_IRQ_ENA
GPIO5_PU
GPIO5_PD
GPIO5_SEL[3:0]
GPI8_DEB_ENA
GPI8_IRQ_ENA
GPI8_ENA
GPI7_DEB_ENA
GPI7_IRQ_ENA
GPI7_ENA
LABEL
0b
0b
0b
0b
1b
0000b
0b
0b
0b
0b
0000b
0b
0b
0b
1b
0000b
0b
0b
0b
1b
0000b
0b
0b
0b
1b
0000b
0b
0b
0b
1b
0000b
0b
0b
0b
0b
0b
0b
DEFAULT
GPIO and GPI Input Pin Status
GPIO_STATUS[7] = GPI8 pin status
GPIO_STATUS[6] = GPI7 pin status
GPIO_STATUS[5] = GPIO6 status
GPIO_STATUS[4] = GPIO5 status
GPIO_STATUS[3] = GPIO4 status
GPIO_STATUS[2] = GPIO3 status
GPIO_STATUS[1] = GPIO2 status
GPIO_STATUS[0] = GPIO1 status
These bits are latched once set. The
GPIO_POL bits determine the
polarity of the input event to set these
bits. They are cleared when a ‘1’ is
written.
See Table 64 for GPIO2 control bit
description
See Table 64 for GPIO1 control bit
description
See Table 64 for GPIO4 control bit
description
See Table 64 for GPIO3 control bit
description
See Table 64 for GPIO6 control bit
description
See Table 64 for GPIO5 control bit
description
See Table 64 for GPI8 control bit
description
See Table 64 for GPI7 control bit
description
DESCRIPTION
PP, April 2009, Rev 3.0
WM8400
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