Spi Bus; Keypad Interface; Figure 3-12: Sim Socket; Table 3-26 : Spi Bus Pin Description - Multitech MTMMC-G-F1 Developer's Manual

SPI Bus

The SPI bus includes a CLK signal, an I/O signal and an EN signal complying with SPI bus standard. The
maximum speed transfer is 3.25Mb/s.

Table 3-26 : SPI Bus Pin Description

Signal
SPI_CLK
SPI_IO
SPI_EO
* See "Table 3-2: Operating Conditions" in section on the 50-pin Connector Description.

Keypad Interface

This interface provides 10 connections: 5 rows (R0 to R4) and 5 columns (C0 to C4).
The scanning is a digital one, and the de-bouncing is done in the integrated modem. No discrete components
like R, C (Resistor, Capacitor) are needed. It is possible to scan the column and rows using the AT+CMER
command. See AT Command manual for more details.

Table 3-27: Keypad Interface Pin Description

Signal
ROW0
ROW1
ROW2
ROW3
ROW4
COL0
COL1
COL2
COL3
COL4
* See "Table 3-2: Operating Conditions" in section on the 50-pin Connector Description.
Wireless ModemModule MTMMC-G-F1 and MTMMC-G-F2 Developer's Guide
SIMVCC
SIMRST
SIMCLK
GND
IK
SIMDATA
SIMPRES1 8

Figure 3-12: SIM Socket

Pin Number I/O
44 O
43 I/O
42 O
Pin Number I/O
39 I/O
40 I/O
37 I/O
38 I/O
35 I/O
36 I/O
33 I/O
34 I/O
31 I/O
32 I/O
Chapter 3 – Electrical Characteristics
1
VCC
2
RST
3 CLK
CC4
GND
VPP
7
I/O
CC8
I/O Type* Description
1X SPI Serial Clock
CMOS/1X SPI Data
1X SPI Enable
I/O Type* Description
CMOS / 1X Row scan
CMOS / 1X Row scan
CMOS / 1X Row scan
CMOS / 1X Row scan
CMOS / 1X Row scan
CMOS / 1X Column scan
CMOS / 1X Column scan
CMOS / 1X Column scan
CMOS / 1X Column scan
CMOS / 1X Column scan
31