2.1.1 Test points ............................................................................................................................................................... 5
2.1.2 Board to board connector ..................................................................................................................................... 5
2.2.2 Power supply and ground ................................................................................................................................... 10
2.2.3 USB interface ........................................................................................................................................................ 11
2.2.9 LED control ........................................................................................................................................................... 19
4.2.1 Message Format .................................................................................................................................................. 25
4.2.2 Set Message Storage Location .......................................................................................................................... 25
4.2.3 PDU Format .......................................................................................................................................................... 26
4.2.4 TEXT Format ........................................................................................................................................................ 27
4.2.5 SMS Service Center Address Setting ............................................................................................................... 29
and so on. The detail information will be described in the following sections.
2.2.1 RF antenna interface
The ground impedance of RF antenna is 50Ω. There are two different modes for connection.
A. Connector mode: Recommended, a connector is on the rear side of PCB board
B. Solder pad mode: Antenna pad and ground pad are on the front side of PCB board
It’s required to use RF cable of which the insertion loss should comply with:
• GSM850/900<1dB
• DCS1800/PCS1900<1.5dB
• UMTS2100/ UMTS1900/ UMTS850<1.5dB
And the gain of antenna should comply with the Table 2-3:
Table 2-3 Antenna gain requirements
Item Parameter
GSM DCS UMTS
Gain (dBi)
0.5 1 1
Type
Omnidirectional antenna
2.2.2 Power supply and ground
There are two power supply input for U6100 module listed as follows:
1. DC +3.4V~+4.2V, for U6100 working voltage;
2. DC +5V, for USB working voltage;
The description of U6100 Power supply and GND pins is shown in Table 2-4 below.
The device does not operate at temperatures below -20°
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Table 2-4 the description of U6100 Power supply and GND pins
Power input Pin name of 60Pin
board to board connector
DC:
VBAT
+3.4V~+4.2V input
USB power input USB_VBUS 39
GND GND 7, 8, 13, 14, 16, 19, 22, 26, 27, 30, 36,
SN. of 60Pin
board to board connector
1, 2, 3, 4, 5, 6
40, 42, 47, 55, 59
2.2.3 USB interface
2.2.3.1 Description
U6100 provides a high-speed USB interface by 60PIN board to board connector, which supports USB 2.0 protocol. The
detail information is given in Table 2-5.
Signals of
USB interface
USB_VBUS USB_VBUS 39 USB power
DM DM 10 USB Data-
DP DP 12 USB Data+
GND GND 7, 8, 13, 14, 16, 19, 22, 26, 27, 30,
Pins of 60Pin
board to board connector
2.2.3.2 Reference circuit
Table 2-5 U6100 USB interface description
SN. of 60Pin
board to board connector
36, 40, 42, 47, 55, 59
Description
GND
The reference circuit of USB interface is shown in Figure 2-7 below.
1) To get the reliable USB power supply, it is recommended to use a 10uF(C406) filter capacitor and a 22pF(C407)
filter capacitor which need to be grounded.
2) To reduce the reflection caused by the high frequency alternating signal in the transmission, it is recommended to
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add a resistor with value below 10Ω to the DM and DP in USB interface to ensure correct transmission for USB
data. Just like the resistors R408 and R409 in Figure 2-7.
3) To avoid static electricity in USB interface, it is recommended to use the ESD protection device. Just like the
varistor RV406, RV407 and RV408 with capacitor values below 3pF.
4) To ensure USB working reliably, it is recommended to use additional protection device.
Figure 2-7 The reference circuit of USB interface
2.2.4 USIM interface
U6100 supports USIM card in UMTS mode as well as SIM card in GSM/GPRS/EDGE mode.
2.2.4.1 Description
U6100 provides USIM card interface by 60PIN board to board connector which can be used in both UMTS and
GSM/GPRS/EDGE networks. The Table 2-6 gives more detail information.
Table 2-6 U6100 USIM card interface description
Signals of
Pins of 60Pin
SN. of 60Pin
Description
USIM interface
DATA USIM_DATA 20 USIM card data
CLK USIM_CLK 38 USIM card CLK
board to board connector
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board to board connector
RST USIM_RESET 18 Reset signal
VCC VREG_EXTUSIM 21 USIM card power
GND GND 7, 8, 13, 14, 16, 19, 22, 26, 27,
30, 36, 40, 42, 47, 55, 59
GND
2.2.4.2 Reference circuit
The reference circuit of USIM interface is shown in Figure 2-8 below.
1) The DATA line of USIM is connected to SIM power supply by a pull-up resistor with reference value 15KΩ.
2) To avoid the instantaneous voltage overflowing, the resistor with reference value 22Ω can be used for the DATA,
CLK and RST line. Just like the resistors R307, R308 and R309 in Figure 2-8.
3) To avoid the static electricity in USIM socket, it is recommended to use the ESD protection device for the DATA,
CLK and VCC line. Just like the varistors RV301, RV302, RV303 and RV304 in figure 2-8 which should be close
to the USIM socket as possible.
4) To get more flat USIM power supply, it is recommended to use the filter capacitors. Just like C311 and C312 in
Figure 2-8 with reference value 33pF and 100nF.
5) To eliminate the peak interference and high frequency interference signal on RST and CLK line, the filter capacities
(C310, C309) can be placed in RST and CLK line, the reference value is 33pF.
Figure 2-8 The reference circuit of USIM interface
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2.2.5 Micro SD card interface
U6100 provides a Micro SD card interface for extended mass memory. The Micro SD card interface can also be used
for T-Flash card and MMC card.
2.2.5.1 Description
U6100 provides Micro SD card interface by 60PIN board to board connector. The Table 2-7 gives the more detail
The reference circuit of Micro SD card interface is shown in Figure 2-9.
1) The data line of Micro SD such as SDCC_DATA0, SDCC_DATA1, SDCC_DATA2, SDCC_DATA3 and
SDCC_CMD, should be connected to Micro SD card power supply by pull-up resistors with reference value 10KΩ.
Just like R304, R305, R301, R302 and R303 in Figure 2-9.
2) To get more flat Micro SD card power supply, it is recommended to use filter capacitors. Just like C307 and C308 in
Figure 2-9, and the reference values are 33pF and 100nF.
3) To eliminate high-frequency interference, it is recommended to use capacitors for Micro SD card data line, such as
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SDCC_DATA0, SDCC_DATA1, SDCC_DATA2, SDCC_DATA3 and SDCC_CMD、SDCC_CLK. Just like C301,
C302, C303, C304, C305 and C306 in Figure 2-9.
4) To avoid static electricity in Micro SD card socket, it is recommended to use the ESD protection device which
should be close to the Micro SD card socket as possible.
Figure 2-9 The reference circuit of Micro SD card interface
2.2.6 Audio interface
The audio signals include a pair of input differential signals(MIC1_P, MIC1_N) and a pair of output differential
signals (EAR1OP, EAR1OR).
2.2.6.1 Description
The audio signals provided by U6100 are described in Table 2-8 below.
Table 2-8 U6100 audio signal description
Pins in
board to board connector
SN. of 60Pin
board to board connector
Description
EAROP 15
EARON 17
MIC_P 9
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Audio output differential signal +
Audio output differential signal -
Audio input differential signal +
MIC_N 14
Audio input differential signal -
2.2.6.2 The connection between audio I/O and earphone
The audio I/O signals provided by U6100 can be connected to a stereo earphone jack which is shown in Table 2-9. The
information about test points is shown in Table 2-1 above.
Table 2-9 The connection between earphone jack and the board to board co nne ctor
Pin name of
earphone jack
Left Speaker EAROP 15
Right Speaker EARON 17
MIC MIC_P 9 The microphone input
PGND GND 14 Analog ground signal
Pins of board to board
connector
SN. of 60Pin board to board
connector
Description
The left output of
The right output of
2.2.6.3 The connection between audio I/O and phone handle
The audio I/O signals provided by U6100 can be connected to a phone handle which is shown in Table 2-10.
Table 2-10 The connection between phone handle and the board to board connec t or
Signals of
phone handle
board to board connector
Pins of
SN. of 60Pin board to
board connector
Description
stereo
stereo
EAR_P EAROP 15
EAR_N EARON 17
MIC_P MIC_P 9
MIC_N MIC_N 11
2.2.6.4 Reference circuit
The reference circuit of audio interface is shown in figure 2-10.
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Audio output differential signal +
Audio output differential signal -
Audio input differential signal +
Audio input differential signal -
Figure 2-10 The reference circuit of audio interface
1) The audio output signals, a pair of differential signals, output to two speaker. The output signal is not real stereo
signal which is different from traditional stereo sounds.
2) It is recommended to use the filter capacitor or filter circuit to reduce inter frequency interference and improve audio
quality. Just like what is shown in Figure 2-10.
3) To avoid static electricity, it is recommended to use the ESD protection device just like the varistors RV501, RV502
and RV503 in Figure 2-10.
4) It requires to connect audio analog signal ground with the general digital circuit ground, magnetic bead or zero ohm
resistance can be used just like R501 in Figure 2-10.
5) J501 is schematic diagram for four section of earphone jack, audio output signals connect with positive differential
signal and negative differential signal, audio input signals connect with positive differential signal only.
2.2.7 PCM interface and SPI interface
U6100 provides PCM and SPI interface by 60PIN board to board connector.
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2.2.7.1 PCM interface description
The information about PCM interface provided by U6100 is described in Table 2-11.
Table 2-11 U6100 PCM interface description
Signals of PCM Pins of
board to board connector
SYNC PCM_SYNC 57 PCM Synchronous Signal
CLK PCM_CLK 24 PCM CLK
D ATA_IN PCM_DIN 25 PCM Input
D ATA_OUT PCM_DOUT 23 PCM Output
SN. of 60Pin board to
board connector
Description
2.2.7.2 SPI interface description
U6100 provides a SPI interface which is simulated by GPIO PIN. The detail information is given in Table 2-12 below.
Table 2-12 U6100 SPI interface description
Signals of SPI Pins in
board to board connector
SN. of 60Pin board to
board connector
Description
DATA_OUT SPI_DOUT 46 SPI Output signal
DATA_IN SPI_DIN 48 SPI Input signal
CLK SPI_CLK 44 SPI CLK
CS SPI_CS 50 SPI CS
2.2.8 UART interface
U6100 provides a UART interface (RS232) by 60Pin board to board connector for debugging.
2.2.8.1 Description
The information about UART interface provided by U6100 is described in Table 2-13.
Table 2-13 U6100 UART interface description
Signals of UART Pins in
SN. of 60Pin board to
Description
board to board connector
board connector
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Rx UART_RX 56 Rx in UART
Tx UART_TX 54 Tx in UART
7, 8, 13, 14, 16, 19, 22, 26,
GND GND
27, 30, 36, 40, 42, 47, 55, 59
GND
2.2.8.2 Reference circuit
The reference circuit of UART interface is shown in Figure 2-11.
1) As the UART interface can only supply TTL level while the PC serial port is RS232 level, it requires to use level
conversion device. The reference device is SP3238EEA which provided by SIPEX, as shown in Figure 2-11. J401 is
a 9 pin serial port socket which can connect to PC with serial cable.
2) To avoid static electricity, it is recommended to use the ESD protection device for the signal line of the UART socket.
Just like the varistors RV401, RV402, RV403, RV404 and RV405 in Figure 2-11 which should be close to the
socket as possible.
Figure 2-11 The reference circ uit of UART inte rface
2.2.9 LED control
2.2.9.1 Description
There are two pins for LED control by the 60 PINs board to board connector. The detail information is given in Table
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2-14.
Table 2-14 U6100 LED control description
Pins of
SN. of 60Pin board to
Description
board to board connector
LED_CTL_G 58 The Green LED control
board connector
LED_CTL_R 60 The Red LED control
U6100 status indication by LED is listed in Table 2-15.
Table 2-15 LED display description
LED Status Description
Green Flicker quickly (100ms On/800ms Off) Networks searching
Flicker slowly(100ms On/3000ms Off) Registered in 3G networks
Flicker more quickly(100ms On/300ms Off) Working in 3G networks, and the data is transmitting
Always On Connected to 3G networks, but no data transmitting
Green + Red Flicker slowly(100ms On/3000ms Off) Registered in 2G networks
Flicker more quickly(100ms On/300ms Off) Working in 2G networks, and the data is transmitting
Always On Connected to 2G networks, but no data transmitting
Off Closed
Red Always On Error(No SIM card or failed in registering
networks )
2.2.9.2 Reference circuit
The reference circuit for LED is shown in Figure 2-12.
Figure 2-12 The reference circuit of L ED control
1) The LED control pin(GPIO) controls the LED through a transistor, as is shown in Figure 2-12.
2) The reference value is 5mA. So the current-limiting resistor may be used. Just like the resistor R14 in Figure 2-12.
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3) The reference circuit is for Green LED, and it is the same for Red LED.
2.2.10 Others
U6100 also provides some other interfaces listed in Table 2-16.
Table 2-16 Other interfaces by U6100
Pins of
board to board connector
SLIC_INT 43 Interrupt signal of peripheral device
SLIC_RESET 41 Reset signal of peripheral device
KPD_PWR_N 52 Power on key
EXT_RST_IN 53 Reset signal of U6100 module
HKADC 28 External ADC input
VREG_MSMP 45 VREG_MSMP voltage output, +2.6V
VCOIN 51 Backup battery power supply input
PWM_OUT 49 PWM output
SN. of 60Pin board to
board connector
Description
1) U6100 provides PWM signal output from PWM_OUT pin of the board to board connector.
2) U6100 provides power supply output named VREG_MSMP, with value of +2.6V and Max current value of
100mA.
3) U6100 provides power supply input pin named VCOIN for backup battery. The anode of the battery connects to
VCOIN, and the cathode connects to ground. The backup battery will provide power supply for the real time clock,
Crystal Oscillator Circuit and SMPL timer while U6100 powered off. And the battery will be charged while U6100
powered on. The voltage offered by battery must be less than 3.6V. To keep the SMPL timer working while sudden
momentary power losing, a backup capacitor connected to VCOIN can be used besides battery. The correlativity
between the capacitance and the holding time is listed in Table 2-17.
Table 2-17 Correlativity between the capacitance and holding time
The capacitance The Packaging (X5R) The holding t ime (s)
1.5uF 0805 0.5
3.3uF 0805 1.0
4.7uF 0805 1.5
6.8uF 1206 2.0
4) KPD_PWR_N is used as power on for U6100 module. U6100 will be power on when connect KPD_PWR_N to
ground. It’s better to use a switch button to connected with KPD_PWR_N and ground, so the module can be power
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on/off by pressing the switch button. It’s recommended to use ESD protection device close to the switch button.
5) EXT_RST_IN is used as reset signal for U6100 module. U6100 will be reset when connect EXT_RST_IN to
ground. It’s better to use a switch button connected to EXT_RST_IN and ground, so the module can be reset by
pressing the switch button. It’s recommended to use ESD protection device close to the switch button.
6) U6100 provides HKADC which can be used to measure some external analog signal, such as battery voltage,
temperature and so on. The voltage input range of the HKADC is : 0~2.6V。
7) SLIC_INT and SLIC_RESET are the signals for peripheral device. SLIC_INT is for interrupt, SLIC_RESET is for
reset.
3. U6100 key features
The U6100 module has features such as internet access, SMS, start-up mode switching, and extended mass memory.
The features are described in following sections. For detail information about AT commands, please make refers to the
related documents.
3.1 Internet access
AT commands can be used for querying/setting the network band, selecting network mode, setting the network search
mode, setting register mode, querying network signal strength, setting APN and so on. The related AT commands are
listed as follows:
·Network Band Set: AT+ BNDPRF =<nv441>, <nv946>
·Network Band Query: AT+BNDPRF?
·Network Mode Set: AT+MODODR=<mode >
·Network Mode Query: AT+MODODR?
·SIM LOCK status: AT+NWLCK?
·Network Mode Service Query: AT+MODPRF?
·Network Query: AT+PSRAT
·PIN and PUK Remain Times Query: AT+CPNNUM
·APN Set: AT+CGDCONT=1,"IP","CMNET"
·Dial up Access: ATDT*99***1#
·Network Disconnecting: ATH
The users need to use PPP protocol for internet access besides AT commands. The PPP protocol can be provided by
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customers or API functions offered by OS, such as the RasDial function in Windows OS.
DWORDRasDial(
LPRASDIALEXTENSIONSdialExtensions,
LPTSTRphoneBookPath,
LPRASDIALPARAMSrasDialParam,
DWORDNotifierType,
LPVOIDnotifier,
LPHRASCONNpRasConn
):
3.2 SMS
The SMS feature is implemented by AT commands. You can set the service center address, switch message format,
enable/disable receiving message report, delete message, preview message, receive/send message and so on.