Seagate ST760211DE manual Way ZIF IDE interface connector signals

Table 8:	40-way ZIF (IDE interface) connector signals
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
27		IORDY /	I/O Channel Ready during register access
		DDMARDY- /	Flow control during Ultra DMA data-out burst
		DSTROBE	Data-in strobe signal for Ultra DMA data-in burst
28		GROUND	Ground
29		DMACK-	DMA Acknowledge
30		INTRQ	Interrupt Request
31		DA01	Address bus bit 1
32		PDIAG-	-
33		DA00	Address bus bit 0
34		DA02	Address bus bit 2
35		CS0-	Chip Select 0
36		CS1-	Chip Select 1
37		DASP-	Used to drive external LED when drive is accessed
38		3.3V	Voltage input
39		3.3V	Voltage input
40		Reserved	-

24 Lyrion Series IDE Product Manual, Rev. B