Siemens SIMATIC NET SPC 4-2 LF Manual page 17

Pin Signal name
20 DB5
21 DB6
22 DB7
23 MODE
24 ALE
AS
25 AB9
26 TXD-TXS
27 RTS-ADD
28 VSS
29 AB8
30 RXD-RXS
31 AB7
32 AB6
33 XCTS
34 XTEST0
35 XTEST1
36 RESET
37 AB4
38 VSS
39 VDD
40 AB3
41 AB2
42 AB5
43 AB1
44 AB0
Table 3-1 Pin Assignment
PROFIBUS Controller SPC 4®-2 LF
C79000-G8976-C157-3
In/ Description
Out
I/O Data bus
I/O Data bus
I/O Data bus
I Timing format of the processor
interface (see Mode Table)
I Address latch enable
Address strobe with Motorola (in
synchronous operation connect
to VDD)
I Address bus
L Serial transmit channel
L Request To Send
I Address bus
I Serial receive channel
I Address bus
I Address bus
I Clear to Send <log> 0 = clear to
send
I Pin must be connected to VDD.
I Pin must be connected to VDD.
I Reset input: connect to port pin
of CPU
I Address bus
I Address bus
I Address bus
I Address bus
I Address bus
I Address bus
Pin Assignment
Source / Dest Processor
CPU, memory /address bus
multiplexed
CPU, memory Otherwise:
data/address bus
CPU, memory separate
System
CPU C32 mode: ALE
Motorola mode
AS
CPU C32 mode: :
<log> 0
RS-485 transmitter
RS-485 transmitter
System, CPU C32 mode: <log>
0
RS-485 receiver
System, CPU C32 mode: <log>
0
System, CPU C32 mode: <log>
0 for CS
MODEM/FSK
System, CPU C32 mode: <log>
0 for CS
System, CPU C32 mode: <log>
0 for CS
System, CPU C32 mode: <log>
0 for CS
System, CPU C32 mode: <log>
0 for CS
System, CPU C32 mode:
address window
System, CPU C32 mode:
address window
Variant
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