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WM8953ECS/RV датащи(PDF) 41 Page - Wolfson Microelectronics plc

номер детали WM8953ECS/RV
подробное описание детали  Low Power Stereo ADC with PLL and TDM Interface
PDF  100 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8953ECS/RV датащи(HTML) 41 Page - Wolfson Microelectronics plc

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Production Data
WM8953
w
PD, January 2009, Rev 4.0
41
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.
•
GPIO3, GPIO4 and GPIO5: Dedicated GPIO pins.
•
LIN3/GPI7 and RIN3/GPI8: Analogue inputs or button/accessory detect inputs.
The following functions are available on some or all of the GPIO pins.
•
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)
The functions available on each of the GPIO pins are identified in Table 19.
GPIO PINS
GPIO Pin Function
GPIO3
GPIO4
GPIO5
GPI7
GPI8
Button/Accessory Detect Input
Y
Y
Y
Y
Y
Clock Output
Y
Y
Y
Temperature OK
Y
Y
Y
PLL Lock
Y
Y
Y
Logic 1 and Logic 0
Y
Y
Y
Interrupt
Y
Y
Y
SDOUT (Readback Data)
Y
Y
Y
Pull-up and Pull-down Available
Y
Y
Y
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.
1. Pin pull-up or pull-down (GPIOn_PU, GPIOn_PD)
2. Audio Interface and GPIO Tristate (AIF_TRIS)
3. GPIO functionality (GPIOn_SEL)



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