WM8959 Wolfson Microelectronics Ltd., WM8959 Datasheet - Page 83
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WM8959
Manufacturer Part Number
WM8959
Description
Mobile Multimedia DAC with Dual-mode Class AB/D Speaker Driver
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet
1.WM8959.pdf
(155 pages)
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The IRQ register (R18) is described in Table 47.
Table 47 GPIO Interrupt and Status Readback
R18 (12h)
R23 (17h)
GPIO
Control (2)
REGISTER
ADDRESS
12
11
10
9
8
7:0
12
BIT
IRQ
(ro)
TEMPOK
(rr)
MICSHRT
(rr)
MICDET
(rr)
PLL_LCK
(rr)
GPIO_STATUS
[7:0]
(rr)
IRQ_INV
(rw)
LABEL
Read Only
Read or
Reset
Read or
Reset
Read or
Reset
Read or
Reset
Read or
Reset
0b
DEFAULT
IRQ Readback
(Allows polling of IRQ status)
Temperature OK status
Read-
0 = Device temperature NOT ok
1 = Device temperature ok
Write -
1 = Reset TEMPOK latch
MICBIAS short status
Read-
0 = MICBIAS ok
1 = MICBIAS shorted
Write-
1 = Reset MICSHRT latch
MICBIAS detect status
MICBIAS microphone detect Readback
Read-
0 = No Microphone detected
1 = Microphone detected
Write-
1 = Reset MICDET latch
PLL Lock status
Read-
0 = PLL NOT locked
1 = PLL locked
Write-
1 = Reset PLL_LCK latch
GPIO and GPI Input Pin Status
GPIO_STATUS[7] = GPI8 pin status
GPIO_STATUS[6] = GPI7 pin status
GPIO_STATUS[5] = Reserved
GPIO_STATUS[4] = GPIO5 status
GPIO_STATUS[3] = GPIO4 status
GPIO_STATUS[2] = GPIO3 status
GPIO_STATUS[1] = Reserved
GPIO_STATUS[0] = GPIO1 status
IRQ Invert
0 = IRQ output active high
1 = IRQ output active low
DESCRIPTION
PP, May 2008, Rev 3.1
WM8959
83
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