Seagate ST740211DE-40GB Interface description, Connector interface signals and connector pins

4.0Interface description

The drives use the industry-standard ATA (IDE) interface. It supports ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–4.

4.1Connector interface signals and connector pins

The following table summarizes the signals on the 40-way ZIF ATA interface connector.

Table 8:	40-way ZIF (IDE interface) connector signals
Pin number		Signal Name	Description
1		Reserved	-
2		Reserved	-
3		RESET-	Hard Reset
4		GROUND	Ground
5		DD07	Data bus bit 7
6		DD08	Data bus bit 8
7		DD06	Data bus bit 6
8		DD09	Data bus bit 9
9		DD05	Data bus bit 5
10		DD10	Data bus bit 10
11		DD04	Data bus bit 4
12		DD11	Data bus bit 11
13		DD03	Data bus bit 3
14		DD12	Data bus bit 12
15		DD02	Data bus bit 2
16		DD13	Data bus bit 13
17		DD01	Data bus bit 1
18		DD14	Data bus bit 14
19		DD00	Data bus bit 0
20		DD15	Data bus bit 15
21		GROUND	Ground
22		DMARQ	DMA request
23		GROUND	Ground
24		DIOW- /	I/O Write to write to device registers or the data port
		STOP	Stop during Ultra DMA burst
25		DIOR- /	I/O Read to read device registers or the data port
		HDMARDY- /	Flow control during Ultra DMA data-in burst
		HSTROBE	Data-out strobe signal for Ultra DMA data-out burst
26		GROUND	Ground

Lyrion Series IDE Product Manual, Rev. F 21