User manual MAXTOR ST3291A

[. . . ] ST3491 Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3250A, ST3291A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3491 Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3250A, ST3291A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 1994 Seagate Technology, Inc. [. . . ] The drivers can sink up to 24 mA and drive a load up to 300 pF. 3. 1 AT interface connector pin assignments The signal name and signal direction for each I/O connector pin is described in Figure 5 on page 18. See the Seagate ATA Interface Reference Manual, publication number 36111-xxx, for a complete description of each pin. If the signal name is followed by a minus sign (­), the signal is active low. The drive does not use the SPSYNC­ signal. 3. 2 Bus signal levels Signals that the drive sends have the following output characteristics, measured at the drive connector. Logic low Logic high 0 to 0. 4V 2. 5 to 5. 25V Signals that the drive receives must have the following input characteristics, measured at the drive connector. Logic low Logic high 0 to 0. 8V 2. 0 to 5. 25V 18 ST3491 Family AT Product Manual, Rev. B 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 Ground DIOR­ Ground IORDY CSEL DMACK­ Ground INTRQ IOCS16­ DA1 PDIAG­ DA0 DA2 CS1FX­ CS3FX­ DASP­ Ground Host pin # and signal description Host Reset Ground Host Data Bus Bit 7 Host Data Bus Bit 8 Host Data Bus Bit 6 Host Data Bus Bit 9 Host Data Bus Bit 5 Host Data Bus Bit 10 Host Data Bus Bit 4 Host Data Bus Bit 11 Host Data Bus Bit 3 Host Data Bus Bit 12 Host Data Bus Bit 2 Host Data Bus Bit 13 Host Data Bus Bit 1 Host Data Bus Bit 14 Host Data Bus Bit 0 Host Data Bus Bit 15 Ground (No Pin) DMA Request Ground Host I/O Write Ground Host I/O Read Ground I/O Channel Ready Cable Select DMA Acknowledge Ground Host Interrupt Request Host 16 Bit I/O Host Address Bus Bit 1 Passed Diagnostics Host Address Bus Bit 0 Host Address Bus Bit 2 Host Chip Select 0 Host Chip Select 1 Drive Active or Slave Present 40 Ground 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 *Indicates master-slave signals (details shown below). Drive 1 (slave) 28 34 39 Drive 0 (master) 28 34 39 Host CSEL PDIAG­ DASP­ 28 34 39 Figure 5. B 19 3. 3 Configuration jumpers Figure 6 shows the location of the options jumper block. If you use a jumper that is not the correct size, you may damage the jumper block and the jumper. Use the jumpers supplied with the drive. 4-pin power connector 1 2 3 4 Circuit board +5V +5V return +12V return +12V Available 2-pin header F ro nt Drive activity LED 40-pin AT interface connector 8-pin options jumper block 7531 3-pin power connector Keyway Circuit board 123 Ground +12V +5V Front The drive is a master; the slave is either an ST3491 family drive or another ATA-compatible drive, or there is no slave. The drive is a master; a slave is present, but it is not ATA-compatible. The drive is a master; a slave is present, but it does not have a DASP- signal. B 3. 3. 1 Factory test configuration Do not install jumpers on pins 5 and 6 and pins 7 and 8 at the same time. When jumpers are installed in both of these positions, the heads continuously seek back and forth across the media and the drive ignores all control signals sent by the interface. 3. 3. 2 Master/slave configuration In a two-drive system, one drive must be configured as the master and the other as the slave. To configure the drive as a master or a slave, install jumpers according to the table in Figure 6 on page 19. Do not configure an ST3491 family drive as a slave to a non-ATAcompatible master drive. 3. 3. 3 No DASP­ configuration When a jumper is installed on pins 1 and 2 of the options jumper block of the master, the master uses the PDIAG­ signal from the slave to recognize that the slave is present during startup and ready for normal operation. Otherwise the drive uses the DASP­ signal according to the CAM ATA specification 3. 2. This configuration allows the ST3491 family drives to be compatible with drives that do not use the PDIAG­ signal. ST3491 Family AT Product Manual, Rev. B 21 3. 4 Cable select configuration If your computer and both of your drives support cable select (CSEL), you can use the cable select option to determine the master and slave. To configure your drives to use cable select, you need to install jumpers and to use a special cable-select cable as follows: · Install a jumper on pins 3 and 4 of the options jumper block as shown in Figure 6 on page 19. When a jumper is installed in this position, the drive ignores master/slave jumpers installed on pins 7 and 8. [. . . ] Interrupts are not presented on each sector but on the transfer of a block that contains the number of sectors defined by Set Multiple Mode command. The number of sectors per block to be transferred without intervening interrupts is programmed by the Set Multiple Mode command, which must be executed prior to the Write Multiple command. When the Write Multiple command is issued, the Sector Count register contains the number of sectors (not the number of blocks or the block count) requested. If the number of requested sectors is not evenly divisible by the block count, as many full blocks as possible are transferred, followed by a final, partial block transfer. [. . . ]