User manual

Page | 20
Pins
Definitions
Descriptions
70
LEDA
LED leg A
71
LEDB
LED leg B
72
ADCIN0
ADC input0 (Battery type)
73
NRESPWRON
Power On Reset
74
NRESWARM
Warm Boot Reset (open drain
output)
75
SYSEN
System enable output
76
GND6
GND
77
REGEN
Enable signal for external LDO
78
ADCIN1
ADC input1 (General-purpose ADC
input)
79
KC0
Keypad column 0
80
KC1
Keypad column 0
81
KC2
Keypad column 0
82
KC3
Keypad column 0
83
AUDIO_IN
Analogue microphone bias 1
84
AUDIO_OR
Predriver output right P for external
class-D amplifier
85
AUXR
Auxiliary audio input right
86
AUDIO_OL
Predriver output left P for external
class-D amplifier
87
GND7
GND
88
VBAT1
Power supply (3V - 4.2V 1.5A)
89
ON/OFF
Input; detect a control command to
start or stop the system
90
VBAT2
Power supply (3V - 4.2V 1.5A)