Siemens Simatic 620 Owner's Manual page 165

Pin
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
# low active
Under normal conditions, the signals -SBHE, LA17 - LA23, -MEMR and MEMW
are operated as outputs (sending from the CPU). Only CPU boards which are
suitable for use as a master CPU for system bus access send and receive these
signals. A minus sign "-" in front of the signal name shows that the signal is LOW
active.
SIMATIC Box PC 620 Manual
A5E00131465-01
Designation Type *
–SBHE#
LA 23
LA 22
LA 21
LA 20
LA 19
LA 18
LA 17
–MEMR#
–MEMW#
SD 08
SD 09
SD 10
SD 11
SD 12
SD 13
SD 14
SD 15
Pin Designation
O D1 –MEMCS16#
I/O D2 –IOCS16#
I/O D3 IRQ 10
I/O D4 IRQ 11
I/O D5 reserved
I/O D6 reserved
I/O D7 reserved
I/O D8 –DACK0#
I/O D9 DRQ 0
I/O D10 –DACK5#
I/O D11 DRQ 5
I/O D12 –DACK6#
I/O D13 DRQ 6
I/O D14 –DACK7#
I/O D15 DRQ 7
I/O D16 + 5V
I/O D17 reserved
I/O D18 0 V
Hardware Information
Type
I
I
I
I
I
I
I
O
I
O
I
O
I
O
I
V
CC
I
GND
7-33