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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

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