Sim Interface - FALCOM I56 Hardware Description

I65/I56I HARDWARE DESCRIPTION
↔ Includes the data lines TX_0 and RX_0, the status lines RTS_0 and
CTS_0 and, in addition, the modem control lines DTR_0, GSM_DSR0,
DCD_0 and RING_0.
↔ It is designed for voice calls, CSD calls, fax calls and GPRS services and
for controlling the GSM engine with AT commands. Full Multiplex
capability allows the interface to be partitioned into three virtual
channels, yet with CSD and fax services only available on the first
logical channel.
↔ The DTR_0 signal will only be polled once per second from the internal
firmware of I56/I56i.
↔ The RING_0 signal serves to indicate incoming calls and other types of
URCs (Unsolicited Result Code). It can also be used to send pulses to the
host application, for example to wake up the application from power
saving state (if required).
↔ Autobauding is selectable on this interface and supports the following bit
rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400
bps.
↔ ASC0 interface is intended for firmware upgrade of the GSM/GPRS
engine.
↔ This interface is configured for 8 data bits, no parity and 1 stop bit, and
can be operated at bit rates from 300 bps to 230400 bps.
↔ XON/XOFF software flow control can be used on this interfaces (except
if power saving is active).

5.6.8 SIM interface

The I56/I56i module includes two SIM interfaces which could not
concurrently be used:
• an integrated SIM card holder, part of I56/I56i module, for small SIM
cards (only 3 V).
• and an integrated 5-pin interface on board-to-board connector for user
application. This SIM circuit can be implemented outside the module
on the application platform. See section
board-to-board connector".
5.6.8.1 SIM Interface on board-to-board connector
The base band processor has an integrated SIM interface compatible with the
ISO 7816 IC card standard. This is wired to the host interface (board-to-board
connector) in order to be connected to an external SIM card holder. Six pins on
the board-to-board connector are reserved for the SIM interface. The
SIMPRES pin serves to detect whether a tray (with SIM card) is present in the
card holder. Using the SIMPRES pin is mandatory for compliance with the
GSM 11.11 recommendation if the mechanical design of the host application
allows the user to remove the SIM card during operation. See chapter
for details. It is recommended that the total cable length between the board-to-
board connector pins on I56/I56i and the pins of the SIM card holder does not
exceed 200 mm in order to meet the specifications of 3GPP TS 51.010-1 and to
satisfy the requirements of EMC compliance.
Signal
GND
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Description
Ground connection for SIM card.
VERSION 1.00
5.6.8.1 "SIM Interface on
Page 41
5.6.8.2