wm8953 Wolfson Microelectronics plc, wm8953 Datasheet - Page 41

• Manufacturer Part Number: wm8953
• Description: Low Power Stereo Adc With Pll And Tdm Interface Low Power Stereo Adc With Pll And Tdm Interface
• Manufacturer: Wolfson Microelectronics plc

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Production Data
GENERAL PURPOSE INPUT/OUTPUT
The WM8953 provides a number of versatile GPIO functions to enable features such as button and
accessory detection and clock output.
The WM8953 has five multi-purpose pins for these functions.
The following functions are available on some or all of the GPIO pins.
The functions available on each of the GPIO pins are identified in Table 19.
Table 19 Functions Available on GPIO Pins
The GPIO pins are configured by a combination of register settings described in Table 20 to Table 23
in the following section. The order of precedence for the control of the GPIO pins is as listed below.
GPIO Pin Function
Button/Accessory Detect Input
Clock Output
Temperature OK
PLL Lock
Logic 1 and Logic 0
Interrupt
SDOUT (Readback Data)
Pull-up and Pull-down Available
•
•
•
•
•
•
•
•
•
•
GPIO3, GPIO4 and GPIO5: Dedicated GPIO pins.
LIN3/GPI7 and RIN3/GPI8: Analogue inputs or button/accessory detect inputs.
Button detect (latched with programmable de-bounce)
MICBIAS / Accessory current or short circuit detect
Clock output
Temperature sensor output
PLL lock output
Logic '1' and logic '0' output
Interrupt event output
Serial data output (register readback)
1. Pin pull-up or pull-down (GPIOn_PU, GPIOn_PD)
2. Audio Interface and GPIO Tristate (AIF_TRIS)
3. GPIO functionality (GPIOn_SEL)
GPIO3
Y
Y
Y
Y
Y
Y
Y
Y
GPIO4
Y
Y
Y
Y
Y
Y
Y
Y
GPIO PINS
GPIO5
Y
Y
Y
Y
Y
Y
Y
Y
PD, January 2009, Rev 4.0
GPI7
Y
GPI8
WM8953
Y
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