
Chapter 3 – Electrical Characteristics
Wireless ModemModule MTMMC-G-F1 and MTMMC-G-F2 Developer’s Guide
23
Table 3-11: Reset Signal Pin Description
Signal
Pin Number
I/O
I/O Type*
Description
~RST
19
I/O
Module reset
* See “Table 3-2: Operating Conditions” in section on the
50-pin Connector Description
.
Table 3-12: Reset Signal Electrical Characteristics
Parameter
Min
Max
Unit
Input Impedance ( R )
4.7
kilo-ohms
Input Impedance ( C )
10
nanofarads
Table 3-13: Reset Signal Operating Conditions
Parameter
Min
Max
Condition
*V
T-
1.1 V
1.2 V
*V
T+
1.7 V
1.9 V
V
OL
0.4 V
I
OL
= -50 microamperes
V
OH
2.0 V
I
OH
= -50 microamperes
V
T-
, V
T+
hysteresis level
Flashing LED
The flashing LED signal is used to indicate the working mode of the ModemModule.
Table 3-14 : Flashing LED Pin Description
Signal
Pin Number
I/O
I/O Type*
Description
Flashing LED
11
I/O
CMOS/2X
Working mode
indication LED
* See “Table 3-2: Operating Conditions” in section on the
50-pin Connector Description
.
Table 3-15 : LED and ModemModule Status
LED Indication
ModemModule Status
OFF
Download mode or switched OFF.
Permanent
Switched ON, not registered on the network.
ON
Flash
Switched ON, registered on the network.