Ide and compactflash (pata), Signal definitions – Kontron COMe Starterkit Eval T2 User Manual
Page 153
COM Express Interfaces
2.24.
IDE and CompactFlash (PATA)
2.24.1.
Signal Definitions
Type 2 and 4 COM Express Modules provide a single channel IDE interface supporting two
standard IDE hard drives or ATAPI devices with a maximum transfer rate of ATA100 (Ultra-DMA-
100 with 100MB/s transfer rate). The corresponding signals can be found on the Module
connector rows C and D.
Table 50:
Parallel ATA Signal Descriptions
Signal
Pin
Description
I/O
IDE40
IDE44
CF
IDE_D0
D7
Bidirectional data to / from IDE device.
I/O 3.3V
17
17
21
IDE_D1
C10
Bidirectional data to / from IDE device.
I/O 3.3V
15
15
22
IDE_D2
C8
Bidirectional data to / from IDE device.
I/O 3.3V
13
13
23
IDE_D3
C4
Bidirectional data to / from IDE device.
I/O 3.3V
11
11
2
IDE_D4
D6
Bidirectional data to / from IDE device.
I/O 3.3V
9
9
3
IDE_D5
D2
Bidirectional data to / from IDE device.
I/O 3.3V
7
7
4
IDE_D6
C3
Bidirectional data to / from IDE device.
I/O 3.3V
5
5
5
IDE_D7
C2
Bidirectional data to / from IDE device.
I/O 3.3V
3
3
6
IDE_D8
C6
Bidirectional data to / from IDE device.
I/O 3.3V
4
4
47
IDE_D9
C7
Bidirectional data to / from IDE device.
I/O 3.3V
6
6
48
IDE_D10
D3
Bidirectional data to / from IDE device.
I/O 3.3V
8
8
49
IDE_D11
D4
Bidirectional data to / from IDE device.
I/O 3.3V
10
10
27
IDE_D12
D5
Bidirectional data to / from IDE device.
I/O 3.3V
12
12
28
IDE_D13
C9
Bidirectional data to / from IDE device.
I/O 3.3V
14
14
29
IDE_D14
C12
Bidirectional data to / from IDE device.
I/O 3.3V
16
16
30
IDE_D15
C5
Bidirectional data to / from IDE device.
I/O 3.3V
18
18
31
IDE_A[0:2]
D13-D15
Address lines to IDE device.
O 3.3V
35, 33, 36
35, 33, 36
20, 19, 18
IDE_IOW#
D9
I/O write line to IDE device.
O 3.3V
23
23
35
IDE_IOR#
C14
I/O read line to IDE device.
O 3.3V
25
25
34
IDE_REQ
D8
IDE device DMA request. It is asserted by
the IDE device to request a data transfer.
I 3.3V
21
21
37
IDE_ACK#
D10
IDE device DMA acknowledge.
O 3.3V
29
29
44
IDE_CS1#
D16
IDE device chip select for 1F0h to 1FFh
range.
O 3.3V
37
37
7
IDE_CS3#
D17
IDE device chip select for 3F0h to 3FFh
range.
O 3.3V
38
38
32
IDE_IORDY
C13
IDE device I/O ready input. Pulled low by
the IDE device to extend the cycle.
I 3.3V
27
27
42
IDE_RESET# D18
Reset output to IDE device, active low.
O 3.3V
1
1
41
IDE_IRQ
D12
Interrupt request from IDE device.
I 3.3V
31
31
43
IDE_CBLID#
D77
Input from off-Module hardware indicating
the type of IDE cable being used. High
indicates a 40-pin cable used for legacy
IDE modes. Low indicates that an 80-pin
cable with interleaved grounds is used.
Such a cable is required for Ultra-DMA 66,
100 modes.
I 3.3V
34
34
46
DASP
39
39
45
GND
2, 19, 22, 24,
26, 30, 40
2, 19, 22, 24,
26, 30, 40,
43
17, 16, 15,
14, 12, 11,
10, 8, 12, 6,
9, 33, 25, 26
39 (master)
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