Siemens SIMATIC Box PC 840 Manual page 150

Hardware Information
Connection for CD ROM/LS120 Drive, X12
The optional CD ROM/LS120 drive is connected via this port. This port is
connected in parallel with the secondary IDE port. The connected LS120 drive is
automatically master (i.e., bootable drive) as the result of a special RC circuit. The
maximum connection length of the data cable may not exceed 40 cm.
Pin No. Designation
1 Reserved
2 Reserved
3 Reserved
4 GND
5 RESET
6 D8
7 D7
8 D9
9 D6
10 D10
11 D5
12 D11
13 D4
14 D12
15 D3
16 D13
17 D2
18 D14
19 D1
20 D15
21 D0
22 DREQ
23 GND
24 IOR_N
25 IOW_N
26 GND
27 IORDY
28 DACK_N
29 IRQ15
30 AD_1
31 AD_0
32 AD_2
33 CS_N
34 HDACT_N
35 CS1_N
36 CSEL
37 GND
38 P5V
39 P5V
40 P5V
41 P5V
7-28
Description
Reserved
Reserved
Reserved
Ground
Reset
Data signal D8
Data signal D7
Data signal D9
Data signal D6
Data signal D10
Data signal D5
Data signal D11
Data signal D4
Data signal D12
Data signal D3
Data signal D13
Data signal D2
Data signal D14
Data signal D1
Data signal D15
Data signal D0
DMA Request
Ground
Read signal
Write signal
Ground
Ready signal
DMA Bestätigung
Interrupt signal
Adress 1
Adress 0
Adress 2
Chip Select
Disk drive activity
Chip Select 1
Chip Select
Ground
+5V power supply
+5V power supply
+5V power supply
+5V power supply
Input / Output
-
-
-
-
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input / Output
Input
-
Output
Output
-
Input
Output
Input
Output
Output
Output
Output
Input
-
Output
Output
Output
Output
SIMATIC Box PC 840 Manual
A5E00085984-04