WM8904ECSSLASHR datasheet(116/188 Pages) WOLFSON

116 / 188 page

WM8904

Pre-Production

PP, Rev 3.3, September 2012

116

GPIO2

The GPIO2 pin is configured using the register bits described in Table 76. By default, this pin is GPIO

input with pull-down resistor enabled.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R122 (7Ah)

GPIO

Control 2

GPIO2_PU

GPIO2 pull-up resistor enable

0 = pull-up disabled

1 = pull-up enabled

GPIO2_PD

GPIO2 pull-down resistor enable

0 = pull-down disabled

1 = pull-down enabled

3:0

GPIO2_SEL [3:0]

0000

GPIO2 Function Select

0000 = Input pin (default)

0001 = Clock output

(f=SYSCLK/OPCLKDIV)

0010 = Logic '0'

0011 = Logic '1'

0100 = IRQ

0101 = FLL Lock

0110 = Mic Detect

0111 = Mic Short

1000 = DMIC clock out

1001 = FLL Clock Output

1010 to 1111 = Reserved

Table 76 GPIO2 Control

GPIO3

The GPIO3 pin is configured using the register bits described in Table 77. By default, this pin is GPIO

input with pull-down resistor enabled.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R123 (7Bh)

GPIO

Control 3

GPIO3_PU

GPIO3 pull-up resistor enable

0 = pull-up disabled

1 = pull-up enabled

GPIO3_PD

GPIO3 pull-down resistor enable

0 = pull-down disabled

1 = pull-down enabled

3:0

GPIO3_SEL [3:0]

0000

GPIO3 Function Select

0000 = Input pin (default)

0001 = Clock output

(f=SYSCLK/OPCLKDIV)

0010 = Logic '0'

0011 = Logic '1'

0100 = IRQ

0101 = FLL Lock

0110 = Mic Detect

0111 = Mic Short

1000 = DMIC clock out

1001 = FLL Clock Output

1010 to 1111 = Reserved

Table 77 GPIO3 Control

WM8904ECS/R 数据表(PDF) 116 Page - Wolfson Microelectronics plc

WM8904ECS/R 数据表(HTML) 116 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载