Schematics

D
C
B
A
1 2 3 4 5 6
A
B
C
D
654321
LED
KEY
DACPOWER
AB5377T2 SOP16 OTP M165 V1. 0
VUSB VBAT VDDIO
1
2
BT-ANT1
ANTENNA_PIFA
C2 105
Y1
26MHZ
BT1
3.4V~4.2V
1
VBUS
2
D-
3
D+
4
ID
5
GND
0
S
0
S
0
S
0
S
JACK1
USB-MICRO
LOUT+1
LOUT-1
C3 NC
C1 NC
C4 NC
C5
NC
LED1
BLUE
LED2
RED
5
VDDIO
6
VBAT
8
VDDBT
2
AGND
7
DGND
10
BT_ANT
11
BT_OSCI
12
BT_OSCO
1
PE7/ADC9
4
VUSB
16
DACL
9
PWRKEY
14
ADC10/MICL/PF2
13
ADC5/PB3
3
PE0
15
VCMBUF
U1
AB5377T2 SOP16 Part No.: HY0E150IH
S1
POWER/PP/PHONE
VUSB VBAT VDDIO
PWRKEY
DAC#
DAC
OSCI
OSCO
MICIN
NEXT
VDDIO
DAC
DAC#
LED
PREV
DAC
DAC#
VDDBT
VBAT
VUSB
LED
BT_ANT
PWRKEY