Multitech MT9234SMI-HV-92 Specifications Page 13
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CHAPTER 2 – UNIVERSAL SOCKET PINOUT
13
Universal Socket Developer Guide
Pin
Signal Name
In/Out
Description
10
Unused
N/A
Reserved for future use.
11
Unused
N/A
Reserved for future use.
12
Unused
N/A
Reserved for future use.
13
Unused
N/A
Reserved for future use.
14
Unused
N/A
Reserved for future use.
15
GPS-SDI
I
GPS Data In.
16
GPS-SDO
O
GPS Data Out.
17
GPS-PPS
GPS Pulse per Second.
18
SPI_CLK
Serial Peripheral Interface custom factory option.
19
SPI_MISO
O
Serial Peripheral Interface custom factory option.
20
SPI_MOSI
I
Serial Peripheral Interface custom factory option.
21
SPI_CS0
Serial Peripheral Interface custom factory option.
22
MIC+
I
Microphone positive input. See individual Device Guides for microphone details.
23
MIC-
I
Microphone negative input. See individual Device Guides for microphone details.
24
-RESET*
I
Device Reset (with pull-up). The active low –RESET input resets the device logic
and returns the configuration of the device to the original factory default values or
"stored values" in the NVRAM. –RESET is tied to VCC through a time-constant
circuit for “Power-on-Reset” functionality. See individual Device Guides for
timings.
A Design Consideration
Allowing the host processor to control the SocketModem’s RESET line allows the
host to reset the device if it fails to respond normally. Resetting the SocketModem
returns it to a known functional state.
25
USB_VBUS
I
USB Voltage Sense. Senses the voltage level of the USB to determine if the bus is
available.
26
GND
GND
Logic Ground.
27
USB_DP
I/O
USB Data Positive. Positive pin of the USB data pair.
28
USB_DN
I/O
USB Data Negative. Negative pin of the USB data pair.
29
LED DCD
O
DCD (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): When lit, indicates a connection. No
series resistor.
30
LED RX
O
RX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
31
LED DTR
O
DTR (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
32
LED TX
O
TX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
33
–RTS
I
Request to Send (Active Low). –RTS is controlled by the DTE to indicate whether
or not the DTE is ready to receive data. –RTS ON (low) indicates that the DTE is
ready to receive data from the modem on RXD. –RTS OFF indicates to the
SocketModem that it should not transfer data on the RXD.
Note: When the –RTS pin is not in use, it should be tied low.
- Universal Socket 1
- Contents 4
- CONTENTS 5
- Universal IP 7
- Developer Documentation 7
- The Universal Socket Design 8
- Embedded Cellular Modems 9
- Embedded Analog Modems 9
- Embedded Device Servers 9
- Power Supply and Blades 11
- Pinout Diagrams 12
- Universal SocketModem Pinout 12
- PC Board Layout Guidelines 16
- USB Design Considerations 18
- Soldering 18
- SocketModem Developer Board 19
- Developer Board Schematics 22
- Board Components 29
- Cellular Safety 31
- Vehicle Safety 32
- Device Maintenance 32
- User Responsibility 33
- Approvals and Certification 34
- Notes: 35
- Other Label Requirements 36
- Chinese Labeling Requirement 39
- 47 CFR Part 68 Telecom 42
- South African Statement 44
- Korea Class B Statement 45
- Japan Requirements 45
- Other Countries 45
- WEEE Directive 46
- Multi-Tech Systems, Inc 47
- Certificate of Compliance 47
- 2011/65/EU 47
- (in Chinese) 49
- PTCRB Antenna Requirements 50
- Authorized Antennas 50
- Coaxial Cable Specifications 53
- SMA-to-MMCX Connector 54
- OEM Integration 55
- Antenna Diversity 56
- Technical Specifications 58
- Features 58
- Models and Documentation 61
- Telecom 63
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