Schematic

1
1
2
2
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D D
C C
B B
A A
TEL0113
Gravity A6 GSM&GPRS Module
HDJ-CD
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1 of 1
V1.0
2017/4/12
17:44:52
A4
NC NC NC NC NC NC NC
PWR_KEY
INT/GPIO1
UART_CTS/GPIO5
UART_RTS/GPIO7
RST
GND
SIM_RST
SIM_CLK
VSIM
SIM_DATA
GND
MIC-
MIC+
MIC_2P
GND EAR_L EAR_R GND REC+ REC- GND VDD_1V8_OUT UART_TXD UART_RXD HST_RXD HST_TXD
GND
GSM_RF
GND
NC
NC
GND
GND
VBAT
VBAT
U1
BS
1
IN
2
SW
3
GND
4
FB
5
COMP
6
EN
7
SS
8
MP2307
U2
1 2
34
5
P1
RX
TX
GND
VCC
P3
33K
R1
10K
R2
22uF
C1
100nF
C4
10nF
C5
22uF
C2
3.9nF
C3
100K
R4
6.8K
R3
SIM_GND
SIM_VCC
SIM_VPP
SIM_RST
SIM_IO
SIM_CLK
SIM
VIN
6.8uHL1
1500uF
C6
MIC_2P
EAR_RGND
GND
EAR_L
GND
P2
300T07
L2
300T07L3
4.7uF
C7
4.7uF
C8
47uH
L4
REC+ REC-
MIC-
MIC+
INT
100nF
C9
VIN
MIC+
MIC-
REC+
REC-
INT
U_TXD U_RXD
U_TXD
U_RXD
VCC
GND
2kR7
INT
4V
4V
4.7k
R10
PWR
PWR
4V
GND
Z1
Z2
mark1 mark2
D3
1M
R9
GND
S1
10pF
C10
D4
RST
RST
100K
R12
GND
RST_C
VIN
MIC+
MIC-
REC+
REC-
INT
GND
RST
P4
Z3 Z4
mark3 mark4
Q2
Q1
Q4
Q3
RST_C