Sim Card Reader; Possible External Devices; Special Functionality Pins - FALCOM A2D-JP Description

Description

5.1.4 SIM card reader

5.1.5 RS 232
2.8 V
300..115200
Table 10: RS 232

5.1.6 Possible external devices

Ω Ω Ω Ω
2 K differential
2 V
0,5 mA
Ω Ω Ω Ω
2 K differential
2 V
0,5 mA
Ω Ω Ω Ω
> 50 (<1nF)
Ω Ω Ω Ω
> 50 (<1nF)
Table 11: Audio
5.2

Special functionality pins

A2D–JP
Internal, for small SIM cards (3 V)
External, 10 ... 15 cm maximum cable length
RS 232
RX, TX, RTS, CTS, DTR, DSR, DCD, RI
Baud rates for serial link (2400 ... 19200 with auto-bauding)
Audio
Microphone 1 impedance
Microphone 1 bias voltage
Microphone 1 input current
Microphone 2 impedance
Microphone 2 bias voltage
Microphone 2 input current
Speaker 1 impedance
Speaker 2 impedance
Table 6 and Tabl e7 show the pin-configuration of the AMP
177984-2.
In these tables CMOS means 2.8 V. You may use a 3 V or 3.3 V
CMOS level logic (never 5 V) on the 2.8 V I/O's. However, it is requi-
red to add serial resistance on all the lines you will use (typical value:
from 4.7 to 10 KΩ).
There are a few pins needed for the operation of the module. The
handling of that pins is described as follows.
Version 1.03
GSM–modem
Side 16