Seagate ST3000DM001 Barracuda 7200.10 PATA Product Manual - Page 45

4.0 ATA interface 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 0-5. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers. You can use a daisy-chain cable to connect two drives to a single AT host bus. For detailed information about the ATA interface, refer to the draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-7), NCITS T13 1410D, subsequently referred to as the Draft ATA-7 Standard. 4.1 ATA interface signals and connector pins Figure 8 on page 39 summarizes the signals on the ATA interface connector that the drive supports. For a detailed description of these signals, refer to the Draft ATA-7 Standard. Drive pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Signal name Reset- Ground DD7 DD8 DD6 DD9 DD5 DD10 DD4 DD11 DD3 DD12 DD2 DD13 DD1 DD14 DD0 DD15 Ground (removed) DMARQ Ground DIOW- STOP Ground DIOR- HDMARDY- HSTROBE Ground IORDY DDMARDY- DSTROBE CSEL DMACK- Ground INTRQ IOCS16- DA1 PDIAG- CBLID- DA0 DA2 CS0- CS1- DASP- Ground Host pin # and signal description 1 Hardware Reset 2 Ground 3 Host Data Bus Bit 7 4 Host Data Bus Bit 8 5 Host Data Bus Bit 6 6 Host Data Bus Bit 9 7 Host Data Bus Bit 5 8 Host Data Bus Bit 10 9 Host Data Bus Bit 4 10 Host Data Bus Bit 11 11 Host Data Bus Bit 3 12 Host Data Bus Bit 12 13 Host Data Bus Bit 2 14 Host Data Bus Bit 13 15 Host Data Bus Bit 1 16 Host Data Bus Bit 14 17 Host Data Bus Bit 0 18 Device Data (15:0) 19 Ground 20 (No Pin) 21 DMA Request 22 Ground 23 Device I/O Write: Stop Ultra DMA Burst 24 Ground 25 Device I/O Read: Host Ultra DMA Ready: Host Ultra DMA Data Strobe 26 Ground 27 I/O Channel Ready Device Ultra DMA Ready Device Ulta DMA Data Strobe 28 Cable Select 29 DMA Acknowledge 30 Ground 31 Device Interrupt 32 Reserved 33 Host Address Bus Bit 1 34 Passed Diagnostics Cable Assembly Type Identifier 35 Device Address (2:0) 36 Device Address (2:0) 37 Chip Select (1:0) 38 Chip Select (1:0) 39 Drive Active/Slave Present 40 Ground Pins 28, 34 and 39 are used for master-slave communication (details shown below). Drive 1 (slave) 28 34 39 Drive 0 (master) Host 28 CSEL 28 34 PDIAG- 34 39 DASP- 39 Figure 8 I/O pins and supported ATA signals Barracuda 7200.10 PATA Product Manual, Rev. F 39