6 Pin Configuration and Functions

Figure 6-1 RTE Package,20-Pin WQFN With Exposed Thermal Pad,Top View

Table 6-1 Pin Functions

PIN		TYPE	DESCRIPTION
NO.	NAME	TYPE	DESCRIPTION
1	IN1P	Analog input	Analog input 1P pin.
2	IN1M	Analog input	Analog input 1M pin.
3	IN2P_GPI1	Analog input/digital input	Analog input 2P pin or general-purpose digital input 1 (multipurpose functions such as digital microphones data, PLL input clock source, and so forth).
4	IN2M_GPO1	Analog input/digital output	Analog input 2M pin or general-purpose digital output 1 (multipurpose functions such as digital microphone clock, interrupt, and so forth).
5	VSS	Ground supply	Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions.
6	SDOUT	Digital output	Audio serial data interface bus output.
7	BCLK	Digital I/O	Audio serial data interface bus bit clock.
8	FSYNC	Digital I/O	Audio serial data interface bus frame synchronization signal.
9	IOVDD	Digital supply	Digital I/O power supply (1.8 V or 3.3 V, nominal).
10	VSS	Ground supply	Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions.
11	GPIO1	Digital I/O	General-purpose digital input/output 1 (multipurpose functions such as digital microphones clock or data, PLL input clock source, interrupt, and so forth).
12	SDA	Digital I/O	Data pin for I²C control bus.
13	SCL	Digital input	Clock pin for I²C control bus.
14	DREG	Digital supply	Digital regulator output voltage for digital core supply (1.5 V, nominal). Connect a 10-μF and 0.1-μF low ESR capacitor in parallel to device ground (VSS).
15	VSS	Ground supply	Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions.
16	AVDD	Analog supply	Analog power (1.8 V or 3.3 V, nominal).
17	AREG	Analog supply	Analog on-chip regulator output voltage for analog supply (1.8 V, nominal) or external analog power (1.8 V, nominal). Connect a 10-μF and 0.1-μF low ESR capacitor in parallel to analog ground (AVSS).
18	VREF	Analog	Analog reference voltage filter output. Connect a 1-μF capacitor to analog ground (AVSS).
19	MICBIAS_GPI2	Analog output/digital input	MICBIAS output or general-purpose digital input 2 (multipurpose functions such as digital microphones data, PLL input clock source, and so forth). If used as MICBIAS output, then connect a 1-μF capacitor to analog ground (AVSS).
20	VSS	Ground supply	Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions.
Thermal Pad	Thermal Pad (VSS)	Ground supply	Thermal pad shorted to internal device ground. Short the thermal pad directly to the board ground plane.