TC35i: Migration from TC35 to TC35i
PRELIMINARY
TC35_TC35i_MIG_01_V01.01 29.1.2003 Page 16 of 34
4.7 Interfaces
TC35 and TC35i interfaces are compatible. The following chapters shows a detailed
comparison values for each interface. For further information please consult the TC35i HW
manual
4.7.1 Serial Interface
Each device uses the same serial interface type with identical pin positions.
Compared to TC35 module that supports a fixed local character framing format between TA
and TE, the new TC35i device offers various character framing formats specified in the next
table. For further information please consult the AT command migration part of the document
or the TC35i at command specification.
The table below shows a comparison of values for the serial interface with both devices.
Table 4-9: RS232 – Serial interface
RS232 - Serial interface
Feature TC35 TC35i
Type: Serial asynchronous transmitter and receiver conforming to ITU-T RS232 Interchange Circuits DCE.
Signal levels: V
out,low,max
= 0.2V @ I = 0.1mA
V
out,high,min
= 2.25V @ I = -0.1mA
V
out,high,max
= 2.76V
V
in,high,min
= 1.95V, V
i,h,max
=3.3V
V
OLmax
= 0.3V @ I = 0.1mA
V
OHmin
= 2.25V @ I = -0.1mA
V
OHmax
= 2.73V
V
IHmin
= 1.95V, V
IHmax
= 3.45V
Local character framing:
fixed to 8 data bits, no parity and 1 stop bit
7E1, 7O1, 8E1, 8N1, 8O1, 7E2, 7O2, 8E2, 8N2,
8O2
Selectable baud rate Fixed range (300bps...115kbps)
Autobauding (1.2kbps...115kbps)
Fixed range (300bps...230kbps)
Autobauding (1.2kbps…230kbps)
Flow Control RTS0 / CTS0 and/or software flow control via XON / XOFF.
4.7.2 SIM card interface
There are no changes on the integrated SIM interface with TC35 and TC35i.
For further information please consult the HW manual for TC35 and TC35i.
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