MTH Inc. MGM-312E Manuel D’Utilisation
GSM/GPRS/EDGE Module(MGM-312E)
Preliminary
Hardware Design
Copyright © by MTH. All rights reserved.
Design Document
Rev 008 – 14 Mars 200611
Page 7 of 34
SPK1P 54
O
Differential
audio
output
SPK1N 56
MIC2P 57
MIC2P 57
I
Differential
audio
input
MIC2N 59
SPK2P 58
SPK2P 58
O
Differential
audio
output
SPK2N 60
Status
Status
NETLIGHT 30
O
Network
status
SPI interface(LCD interface) / USB interface
SPI1_CLK / USB_DM
SPI1_CLK / USB_DM
20
I/O
Defaults are as
USB and GPIO
USB and GPIO
,
they can be
multiplexed as SPI
multiplexed as SPI
If these pins are
unused, keep open
unused, keep open
SPI1_DATA / USB_DP
18
I/O
SPI1_SDIO / USB_DET
24
I/O
SPI1_CS / GPIO20
22
O
SPI1_RST / GPIO21
26
O
Keypad interface / GPIOs / I2C1 / I2C2 / Etc.
ROW0/GPIO54/I2C1_SDA 27
ROW0/GPIO54/I2C1_SDA 27
I/O
Defaults are as
KEYPAD
KEYPAD
ROW1/GPIO53/I2C1_SCK 29
I/O
ROW2/GPIO60/SIM2_RST/ 31
I/O
ROW3/GPIO19/SIM2_CLK 33
I/O
ROW4/GPIO18/SIM2_DATA 35
I/O
COL0/GPIO49/HS_DET 37
I/O
COL1/GPIO55/I2C2_SDA 39
I/O
COL2/GPIO56/I2C2_SCK 41
I/O
COL3/GPIO16/DBG_CTS 43
I/O
COL4/GPIO14/DBG_RTS 45
I/O
Serial port
RXD
40
I
Receive data
This pin should be
pulled up to 2.8V
externally
pulled up to 2.8V
externally
TXD 42
O
Transmit
data
If these pins are
unused, keep open
(voltage Level: 2.8V)
RTS
44
I
Request to send
CTS
46
O
Clear to send
RI 48
O
Ring
indicator
DCD
28
O
Data carry detect
DTR
38
I
Data terminal Ready
Debug interface
DBG_TXD / GPIO17
DBG_TXD / GPIO17
49
O
Serial interface for
debugging or GPS
interface
debugging or GPS
interface
If these pins are
unused, keep open.
unused, keep open.
DBG_RXD / GPIO15
47
I
SIM interface
SIM_VDD
SIM_VDD
19
O
Voltage supply for
SIM card. Support
1.8V or 3.0V SIM
card
SIM card. Support
1.8V or 3.0V SIM
card
All signals of SIM
interface. If
SIM_PRESENCE is
unused, just keep open
SIM_DATA
21
I/O
SIM data in/out
SIM_CLK 23
O
SIM
clock
SIM_RST 25
O
SIM
reset
SIM_PRESENCE / GPIO44
16
I/
SIM card detection
ADC
ADC0 52
I
General
purpose
analogy to digital
converter. Input
voltage: 0V~2.8V
converter. Input
voltage: 0V~2.8V
If it is unused, keep
open.
open.
Pulse With Modulation
BUZZER
36
O
PWM output
If it is unused, keep
open.
open.