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TC35i: Migration from TC35 to TC35i
P R E L I M I N A R Y
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
Serial Interface
4.7.1
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
Feature
Type:
Serial asynchronous transmitter and receiver conforming to ITU-T RS232 Interchange Circuits DCE.
Signal levels:
V
out,low,max
V
out,high,min
V
out,high,max
V
in,high,min
Local character framing:
fixed to 8 data bits, no parity and 1 stop bit
Selectable baud rate
Fixed range (300bps...115kbps)
Autobauding (1.2kbps...115kbps)
Flow Control
SIM card interface
4.7.2
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.
TC35_TC35i_MIG_01_V01.01
RS232 - Serial interface
TC35
= 0.2V @ I = 0.1mA
= 2.25V @ I = -0.1mA
= 2.76V
= 1.95V, V
=3.3V
i,h,max
RTS0 / CTS0 and/or software flow control via XON / XOFF.
29.1.2003
TC35i
V
= 0.3V @ I = 0.1mA
OLmax
V
= 2.25V @ I = -0.1mA
OHmin
V
= 2.73V
OHmax
V
= 1.95V, V
= 3.45V
IHmin
IHmax
7E1, 7O1, 8E1, 8N1, 8O1, 7E2, 7O2, 8E2, 8N2,
8O2
Fixed range (300bps...230kbps)
Autobauding (1.2kbps...230kbps)
Page 16 of 34
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