Seagate ST1.3 ST1.3 Series Product Manual - Page 31

4.0 Interface description These drives use the industry-standard ATA task file interface that supports 16-bit data transfers. It supports ATA programmed input/output (PIO) modes 0-4; multiword DMA modes 0-2, and Ultra DMA modes 0-4. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers. For detailed information about the 35-way ZIF (IDE interface) connector, please contact your local Seagate representative. 4.1 Connector interface signals and connector pins The following table summarizes the signals on the 35-way ZIF (zero insertion force) IDE interface connector. For a detailed description of these signals, please contact your local Seagate representative. Table 8: Pin Num 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 35-way ZIF (IDE interface) connector signals Signal Name GND D10 D09 D02 D08 D01 Res D00 Res A00 DMACKA01 DMARQ A02 IORDY RESETRes VCC VCC IRQ IOWR- In, Out Type Ground Data bus bit 10 Data bus bit 09 Data bus bit 02 Data bus bit 08 Data bus bit 01 Reserved. Do not connect Data bus bit 0 Reserved. Do not connect Address bus bit 0 DMA Acknowledge Address bus bit 1 DMA Request Address bus bit 2 I/O Ready DMA ready during Ultra DMA data-in bursts DMA strobe during Ultra DMA data-out bursts Hard Reset Reserved. Do not connect 3.3V Voltage supply to drive 3.3V Voltage supply to drive Interrupt request I/O Write Stop during DMA data bursts ST1.3 Series Product Manual, Rev. D 25