Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 21 of 92 21.12.2001
3 Application Interface
The GSM engine connects to the application platform over the host interface, which takes
the form of a 40-pin 0.5mm pitch ZIF connector.
The host interface incorporates several sub-interfaces described in the following chapters:
• Power supply and charging (see Chapters 3.2 and 3.3)
• Serial interface (see Chapter 3.5)
• Two audio interfaces (see Chapter 3.6)
• SIM interface (see Chapter 3.7)
GSM Engine
(TC35 or TC37)
User application
Host interface via
ZIF connector and FFC
SIM
Figure 3: Block diagram of a cellular application
Electrical and mechanical characteristics of the ZIF connector are specified in Chapter 5.4.
Ordering information for the ZIF connector and the required cables are listed in Chapter 6.