Detailed descriptions   
16.1 Motherboard 
  SIMATIC Box PC 627 
16-8  Operating Instructions, Release 05/2006, A5E00362052-03 
Compact Flash Card, X4 
 
Compact Flash card port 
Pin No.  Abbreviation  Meaning 
41  RESET#  Reset (output) 
7  CS0#  Chip select 0(output) 
32  CS1#  Chip select 1(output) 
34  IORD#  I/O read (output) 
35  IOWR#  I/O write (output) 
20, 19, 18,  A0-A2  Address bit 0-2 (output) 
17, 16, 15, 14, 12, 11, 10, 8  A3-A10  Address bit 3-10 (output) to ground 
21, 22, 23, 2, 3, 4, 5, 6, 47, 48, 49, 
27, 28, 29, 30, 31 
D0-D15  Data bits 0-15 (in/out) 
37  INTRQ  Interrupt request (input) 
9  OE# /ATA SEL#  Enables True IDE mode 
24  IOCS16#  I/O-chip select 16 (input) 
39  CSEL#  Cable select (output) 
42  IORDY  I/O ready (input) 
46  PDIAG#  Passed diagnostic 
45  DASP#  Drive active/slave present (not 
connected) 
26, 25  CD1#, CD2#  Card detect (not connected) 
33, 40  VS1#, VS2#  Voltage sense (not connected) 
43  DMARQ  DMA request (input) 
44  DMACK#  DMA acknowledge (output) 
36  WE#  Write enable 
1, 50  GND  Ground 
13, 38  VCC  + 3.3V power