Rtc Backup; Control Signals; Interfaces; Table 9: Serial Interface - Siemens MC35 Migration Manual

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Migration from MC35 to MC35i
P R E L I M I N A R Y
Battery pack
4.4.4
MC35i has no charging management for external batteries.
4.5

RTC backup

MC35 and MC35i are fully identical regarding the internal Real Time Clock.
4.6

Control signals

Input and Output control signals are identical with both MC35 and MC35i device.
4.7

Interfaces

MC35 and MC35i interfaces are compatible. The following chapters shows a detailed
comparison values for each interface. For further information please consult the MC35i HW
manual.
Serial interface
4.7.1
Each device uses the same serial interface (compliant with ITU-Standard V.24) with
identical pin positions.
The table below shows a comparison of values for the serial interface with both devices.

Table 9: Serial interface

Feature
Type:
Serial asynchronous transmitter and receiver conforming to ITU V.24 Interchange Circuits DCE.
Signal level
V
out,low,max
V
out,high,min
V
out,high,max
V
in,high,min
V
in,high,max
Local character framing:
Selectable baud rate
Fixed range (300bps...115kbps)
Autobauding (1.2kbps...115kbps)
Flow Control
Migration from MC35 to MC35i
Serial interface
MC35
= 0.2V @ I = 0.1mA
= 2.25V @ I = -0.1mA
= 2.76V
= 1.95V
=3.3V
fixed to 8 data bits, no parity and 1 stop bit
RTS0 / CTS0 and/or software flow control via XON / XOFF.
15 of 30
MC35i
V
= 0.3V @ I = 0.1mA
out,low,max
V
= 2.25V @ I = -0.1mA
out,high,min
V
= 2.73V
out,high,max
V
= 1.95V
in,high,min
V
= 3.45V
in,high,max
Fixed range (300bps...230kbps)
Autobauding (1.2kbps...230kbps)
12.03.03

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