Rainbow Electronics MG260 - Manual (Page 41)

MG260 Product Specification
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2.6.4 SIM interface
The MG260 module is designed to interface with 3V or 1.8V SIM cards, in
compliance
with ETS 300 641 and 3GPP TS 51.011 V5.0.0
recommendations
Signal Pin # I/O I/O type Description
SIM_CLK 23 O 2X SIM Clock
SIM_RST 25 O 2X SIM Reset
SIM_DATA 27 I/O CMOS / 3X SIM Data
SIM_VCC 29 O - SIM Power Supply
SIM_PRES 70 I CMOS SIM Card Detect
Note for SIM_PRES connection:
• The extraction of a card is reported if the SIMEN signal is pulled LOW; deactivation is
started immediately. The interrupt caused by this event is debounced with 14 ms.
Note that the interrupt is generated immediately. Any further SIMEN status changes
within the following 14 ms do not generate new interrupts.
2.6.5 Keyboard interface
This interface provides 8 connections:
• 4 rows (ROW0 to ROW3),
• 4 columns (COL0 to COL3).
The scanning is a digital one, and the debouncing is done in the
MG260 module. No discrete components like resistors or capacitors are needed.
The keyboard scanner is equipped with internal pull-down resistors for the rows and
pull-up resistors for the columns. Current only flows from the column pins to the row
pins.
Pin description
Signal Pin # I/O I/O type Description
ROW0 33 I/O CMOS / 1X Row scan
ROW1 35 I/O CMOS / 1X Row scan
ROW2 37 I/O CMOS / 1X Row scan
ROW3 39 I/O CMOS / 1X Row scan
COL0 43 I/O CMOS / 1X Column scan
COL1 45 I/O CMOS / 1X Column scan