Device Reset; Rs-232 Signal Dc Electrical Characteristics; Absolute Maximum Rating; Electrical Characteristics Other Pins - Multitech SocketModem Cell HSPA+ MTSMC-H5 Series Device Manual

Device Reset

The SocketModem is ready to accept commands after a fixed amount of time ("X" Time) after power-on or reset.
Model
MTSMC-H5
1
The SocketModem may respond to a shorter reset pulse.

RS-232 Signal DC Electrical Characteristics

Units: Volts
Applies to the following pins:
Pin Signal Name
J33 -RTS
J34 -RXD
J35 -TXD
J36 -RI
Parameter
3.3 Volt Powered
Input Low Level
Input High Level
Output Low Level
Output High Level
5 Volt Powered
Input Low Level
Input High Level
Output Low Level
Output High Level

Absolute Maximum Rating

All models can run with an input voltage of either 3.3V or 5V. The maximum voltage on any signal pin equals the
input voltage.

Electrical Characteristics Other Pins

Pin Signal Name
J24 -RESET
J25 USB VBUS
J26 GND
J27 USB DP
J28 USB DN
J41 GND
J48 GPIO0
SocketModem Cell HSPA and SocketModem iCell HSPA MTSMC-H5 Device Guide
Time Constant
250 ms
Pin Signal Name
J37 -DSR
J38 -CTS
J39 -DCD
J40 -DTR
Minimum
0
1.5
0
2.35
0
2.3
0
3.7
VIL
Min Max
0.8
-0.3 0.8
-- --
0.8
0.8
-- --
-0.3 0.8
"X" Time
10 seconds
Maximum
0.55
3.3
0.55
3.3
0.8
5
0.55
5
VIH VOL
Min Max Min
2.0 --
2.0 8.7 --
-- -- --
2
2
-- -- --
2.0 5.5
CHAPTER 3 – SPECIFICATIONS
Minimum Reset Pulse
200 US
VOH
Max Min Max
-- -- --
-- -- --
-- -- --
0.3 2.8
0.3 2.8
-- -- --
0.4 2.9
1
10