Pin Availability By Build - Multitech SocketModem Cell Cat M1 Device Manual

Pin Signal Name
J25 USB VBUS
J26 GND
J27 USB DP
J28 USB DN
J33 –RTS
J34 –RXD
J35 –TXD
J36 –RI
J37 –DSR
J38 –CTS
J39 –DCD
J40 –DTR
J41 GND
J58 –LED LINK
J61 VCC
J63 GND
1
A hyphen (-) indicates a range of acceptable logic levels.
Note: Except for RESET, connect unused I/O pins to GND. If RESET is unused, connect it to VCC

Pin Availability by Build

Pin
J24
J25
J26
J27
®
SocketModem Cell Cat M1 MTSMC-MNG6 Device Guide
Logic Level
1
Voltage
3.3 – 5.0
GND
3.3
3.3
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
GND
3.3
5.0
GND
Signal Name
–RESET
USB VBUS
GND
USB DP
In/Out Description
Input with 47KΩ USB power supply input
pull-down
N/A Ground
3.3V I/O USB data
3.3V I/O USB data
Input with 47KΩ Request to send (active low)
pull-down
Output with 47KΩ Received data (active low)
pull-up
Input with 47KΩ Transmitted data (active low)
pull-down
Output with 47KΩ Ring indicator (active low)
pull-up
Output with 47KΩ Data set ready (active low)
pull-up
Output with 47KΩ Clear to send (active low)
pull-up
Output with 47KΩ Data carrier detect (active low)
pull-up
Input with 47KΩ Data terminal ready (active low)
pull-down
N/A Ground
Open Drain Link status (active low, can sink up to
150mA)
Power DC input power
N/A Ground
Serial Only USB Only
X X
X
X X
X
SPECIFICATIONS
13