Siemens SPC3 - Switching Diagram Principles

SPC3 PROFIBUS Interface Center
SPC3 Hardware Description V1.3 Page 39
Copyright (C) Siemens AG 2003 All rights reserved. 2003/04
7.1.3 Switching Diagram Principles
AB 15...8
Pulse Generator
48MHz
80C32/
C501
Port 0
ALE
Port 2
CLK
XW R
XRD
X/INT
AB8
AB9
AB10
Low Cost System with 80C32
1K 1K
3K3
Mode
GND VDD
RTS
TxD
RxD
XCTS
1K
GND
A / D 7...0
(0000 00XXBIN)
W R
RD
INT0
Pulse Generator
48 MHz
80C32
20/16MHz
Port 0
Port 2
CLK
XW R
XRD
X/INT
AB8
AB9
AB10
80C32 System with Ext. Memory (C32-Mode)
1K 1K 3K3
Mode
GND
VDD
SPC3
Reset
RTS
TxD
RxD
XCTS
1K
GND
SPC3
Reset
ALE
Address
Latch
EPROM
64kB
RAM
32kB
Address
Decoder
AB 15...0
Reset
PSEN
SPC3
Reset
SPC3 AB 7..0
Address
decoder
DB 7..0
Data
DB 7..0
Address Latch
A / D 7...0
RD W R
AB 7....0
Address-
decoder
DB 7..0
Data
DB 7..0
Address Latch
AB 15...8
(0000 00XX BIN)
W R
RD
INT0
1K
Divider :2/4
DIVIDER
12/24 MHz
12/24 MHz
Scaler:2/4
DIVIDER
1K