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WM8991 Datasheet(PDF) 150 Page - Wolfson Microelectronics plc

Part # WM8991
Description  Mobile Multimedia CODEC with Dual-Mode Class AB/D Speaker Driver
PDF  174 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8991 Datasheet(HTML) 150 Page - Wolfson Microelectronics plc

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WM8991
Pre-Production
w
PP, May 2008, Rev 3.1
150
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
7:0
ADCR_VOL
[7:0]
1100_
0000b
(0dB)
Right ADC Digital Volume
(See Table 16 for volume range)
R17 (11h)
15:0
0000h
Reserved - Do Not Change
15:13
0dB
Reserved - Do Not Change
12
IRQ
(ro)
Read Only
IRQ Readback
(Allows polling of IRQ status)
11
TEMPOK
(rr)
Read or
Reset
Temperature OK status
Read-
0 = Device temperature NOT ok
1 = Device temperature ok
Write -
1 = Reset TEMPOK latch
10
MICSHRT
(rr)
Read or
Reset
MICBIAS short status
Read-
0 = MICBIAS ok
1 = MICBIAS shorted
Write-
1 = Reset MICSHRT latch
9
MICDET
(rr)
Read or
Reset
MICBIAS detect status
MICBIAS microphone detect Readback
Read-
0 = No Microphone detected
1 = Microphone detected
Write-
1 = Reset MICDET latch
8
PLL_LCK
(rr)
Read or
Reset
PLL Lock status
Read-
0 = PLL NOT locked
1 = PLL locked
Write-
1 = Reset PLL_LCK latch
R18 (12h)
GPIO Control
(1)
7:0
GPIO_STATUS
[7:0]
(rr)
Read or
Reset
GPIO and GPI Input Pin Status
GPIO_STATUS[7] = GPI8 pin status
GPIO_STATUS[6] = GPI7 pin status
GPIO_STATUS[5] = GPIO6 pin status
GPIO_STATUS[4] = GPIO5 pin status
GPIO_STATUS[3] = GPIO4 pin status
GPIO_STATUS[2] = GPIO3 pin status
GPIO_STATUS[1] = GPIO2 pin status
GPIO_STATUS[0] = GPIO1 pin status
15
GPIO2_DEB_ENA
0b
GPIO2 Input De-Bounce
0 = disabled (Not de-bounced)
1 = enabled (Requires MCLK input and TOCLK_ENA=1)
14
GPIO2_IRQ_ENA
0b
GPIO2 IRQ Enable
0 = disabled
1 = enabled (GPIO2 input will generate IRQ)
13
GPIO2_PU
0b
GPIO2 Pull-Up Resistor Enable
0 = Pull-up disabled
1 = Pull-up enabled (Approx 150k
Ω)
R19 (13h)
GPIO1 and
GPIO2
12
GPIO2_PD
1b
GPIO2 Pull-Down Resistor Enable
0 = Pull-down disabled
1 = Pull-down enabled (Approx 150k
Ω)



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