User's Manual

24
SPI_CLK CMOS Input Serial Peripheral Interface Clock
25
SPI_MISO CMOS OutputSerial Peripheral Interface Data Output
26
SPI_MOSI CMOS Input Serial Peripheral Interface Data Input
27
SPI_CSB CMOS Input Chip Select For Synchronous Serial Interface active low
28V18_OUTPower Output1.8v output from module
29PIO21
Bi-directional
Programmable Input/Output line.
30USB_DN
Bi-directional
USB port D-
31USB_DP
Bi-directional
USB port D+
32CHG-EXTAnalog OutputExternal charging control output.
33
VBAT_SENSEAnalog InputBattery level sensing input.
34VBATPower inputPower input.
35VCHGPower Input5V charging input.
36AGNDAnalog GroundAudio analog ground
37MIC_BiasAnalog OutputMic circuit bias control.
38AIO0Analog InputAuxiliaryADC input.
39VREGCMOS InputPower up control input.