User's Manual

Chapter 3 – Electrical Characteristics
Wireless ModemModule MTMMC-C Developer's Guide 9
50-Pin Connector Interfaces (Continued)
Pin # Name I/O I/O Type Description Comment
31 COL3 I/O 1X Keypad column
32 COL4 I/O 1X Keypad column
33 COL1 I/O 1X Keypad column
34 COL2 I/O 1X Keypad column
35 ROW4 I/O 1X Keypad row
36 COL0 I/O 1X Keypad column
37 ROW2 I/O 1X Keypad row
38 ROW3 I/O 1X Keypad row
39 ROW0 I/O 1X Keypad row
40 ROW1 I/O 1X Keypad row
41 NC Not Connected
42 SPI_EN O 1X SPI enable
43 SPI_IO I/O 1X I
2
C Data or SPI Data
44 SPI_CLK O 2X I
2
C Clock or SPI Clock
45 SIMCLK O 2X Clock for SIM interface 3V mode
46 SIMRST O 2X Reset for SIM interface 3V mode
47 SIMVCC O SIM card supply 3V mode
6mA max.
48 SIMPRES I SIM card detect Connected to
SIM connector
pin 8. Pin 4 of
SIM connector
must be pulled
down to GND
with 1 K-Ohm*
49 SIMDATA I/O 3X I/O for SIM interface 3V mode
50 GPO0 General purpose I/O
* See SIM socket diagram in SIM interface section
** GPO0 is a general purpose output for selection of external SIM, 3V or 5V.