Schematic

ManualsBrandsiTead Studio ManualsCellular / GPRS / GSMITEAD SIM900 GPRS / GSM Module

Rev:

Date：

File Name:

Designed by

Sheet Name:

Project Name:

Company:

B

1

A

1

B

D

C

D

C

A

B

123456

MAIN

sim900_module_A.sch

Page size:

Page Num:

of

1

PERKEY

2

NC

3

DTR

4

RI

5

DCD

6

NC

7

CTS

8

RTS

9

TXD

10

RXD

11

DISP_CLK

12

DISP_DATA

13

DISP-D/C

14

DISP_CS

15

VDD_EXT

16

RESET#

17

GND

18

GND

19

MIC_P

20

MIC_N

21

SPK_P

22

SPK_N

23

LINEIN_R

24

LINEIN_L

25

ADC

26

VRTC

27

DBG_TXD

28

DBG_RXD

29

GND

30

SIM_VDD

31

SIM_DATA

32

SIM_CLK

33

SIM_RST

34

SIM_PRESENCE

35

PWM1

36

PWM2

37

SDA

38

SCL

39

GND

40

GPIO1

41

GPIO2

42

GPIO3

43

GPIO4

44

GPIO5

45

GND

46

GND

47

GPIO6

48

GPIO7

49

GPIO8

50

GPIO9

51

GPIO10

52

NETLIGHT

53

GND

54

GND

55

VBAT

56

VBAT

57

VBAT

58

GND

59

GND

60

RF_ANT

61

GND

62

GND

63

GND

64

GND

65

GND

66

STATUS

67

GPIO11

68

GPIO12

U1

SIM900

1

CLK

2

RST

3

VCC

4

GND

5

VPP

6

SDIO

J1

SIM-6PIN

C1

100nF

C2

100nF

C4

100nF

C5

100nF

1

2R1

22R

1

2R2

22R

1

2R3

22R

C3

NC

1

2

R4

10K

1

2R5

10K

1

2

R6

10K

1

2R7

10K

1

2

R8

10K

1

2R9

10K

1

2

R10

10K

1

2R11

10K

1 2

B1

BUTTON-SMD-2PIN

U2

U3

U4

U5

1

EN

2

IN

3

GND

4

OUT

5

ADJ

IC1

MIC2930X

C11

100nF

1

2

R12

100K

1

2R13

43K

C13

100nF

1 2

L1

IND-UPRIGHT

100Ohm@100MHz

1

ANT

J10

ANT

1

ANT

J11

ANT

1

2R14

0R

1

2R15

0R

C15

NC

C16

NC

A K

D1

LED

1

2

R18

1K

A K

D3

LED

1

2

R19

1K

2E

1

B

3C

Q1

1

2

R20

10K

1

2R21

1K

A K

D2

LED

1

2

R22

1K

2E

1

B

3

C

Q2

1

2

R23

10K

1

2R24

1K

1 2

B3

BUTTON-SMD-2PIN

12

C12

470uF

12

C14

470uF

C19

100nF

1

2

3

TVS3

TVS

1

2

3

TVS4

TVS

2 E

1

B

3 C

Q3

1

2R16

1K

1

2R17

10K

1

2

3

4

5

6

7

8

JP3

8X1-PIN

2

E

1

B

3

C

Q4

1

2R25

1K

1

2R26

10K

12

C6

CAP-P

1

GND

2

R

3

L

J2

3.5INCH-SONIC-JACK

1

GND

2

R

3

L

J3

3.5INCH-SONIC-JACK

C7

33pF

C8

33pF

C9

1uF

1

2

R27

10R

C10

33pF

C17

33pF

1

2

R28

10R

RF_ANT

VBAT

STATUS

NETLIGHT

TXD

RXD

VDD_EXT

RESET#

SIM_VDD

SIM_DATA

SIM_CLK

SIM_RST

DBG_TXD

DBG_RXD

VBAT

SIM_DATA

SIM_CLK

SIM_RST

SIM_VDD

PERKEY

VDD_EXT VIN

TXD TXD_VIN

VDD_EXT VIN

RXD RXD_VIN

VDD_EXT VIN

DBG_TXD DBG_TXD_VIN

VDD_EXT VIN

DBG_RXD DBG_RXD_VIN

VIN VBAT

RF_ANT

VBAT

3.9V

STATUS

3.9V

NETLIGHT

SIM_CLK

SIM_RST

SIM_VDD

SIM_DATA

VIN

PERKEY

DBG_RXD_VIN

DBG_TXD_VIN

RXD_VIN

TXD_VIN

RESET#

3.9V

MICP

SPKP

SPKN

SPKP

MICP

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