Schematics

1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2019/5/15 Sheet of
File: F:\
艾文档
\..\76200 RX - 2171B - LDO.SCHDrawn By:
2
3
1
S1
SW-SPDT
BT1
3V
F1
NSML150
VBAT
R1
100R
VCC
1
VDD
8
OUT_A
2
IN_A
7
GND
3
IN_B
6
GND
4
VCC
5
OUT_B
U2
NY9M012B
IN_A
IN_B
VCC
C13
22UF
R2
2R2
VBAT
-
+
M1
C14
22UF
IN_A
IN_B
Touch
LED1
C10
100nF
VCC
L1
2.7nH
C6
10pF
C7
10pF
C12
1.2pF
ANT1
EXT_ANT
Y2
12MHz
VCC
VDD33D
3
ANT
1
GND
2
PA1/AIN1/ISPSCK
4
PB0/AIN3
5
PA2/AIN2
6
PB5/PINT1
7
PA0/AIN0/ISPSDA
8
VDD33
9
PA5/PINT3
10
PB1/AIN4/PINT1
11
PA7/AIN5/PINT3
12
PA3/PINT1/MRSTN
13
XTALN
14
XTALP
15
VDD33A_RF
16
U1
HW2171B SOP16
VCC
Gnd
1
OUT
2
IN
3
U4
SR5301 2.8V
C19
22UF
C11
100nF
VBAT
C15
22UF
C8
100nF
C18
22UF
C9
100nF
VCC