User manual MAXTOR ST9080A

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST9235 Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST9080A, ST9145A, ST9145AG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST9235A, ST9235AG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AT Interface Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] B Dimensions are in inches (mm) 0. 750 (19. 05) max 17 0. 118 ± 0. 010 (3. 00 ± 0. 25) 0. 000 4X 3 mm × 0. 5 mm 0. 15 in. (3. 81 mm) min full thread 0. 152 ± 0. 005 (3. 86 ± 0. 13) 1. 227 ± 0. 025 (31. 17 ± 0. 64) 4. 010 (101. 85) max 1. 500 ± 0. 010 (38. 10 ± 0. 25) 0. 000 1. 375 ± 0. 015 (34. 93 ± 0. 38) 0. 155 ± 0. 025 (3. 94 ± 0. 64) 0. 000 0. 239 ± 0. 025 (6. 07 ± 0. 64) 2. 760 (70. 10) max 2. 430 ± 0. 020 (61. 72 ± 0. 51) 4X 3 mm × 0. 5 mm 0. 15 in (3. 81 mm) min full thread Pin 20 removed for keying 0. 079 (2. 00) Pin 1 0. 157 ± 0. 009 (3. 99 ± 0. 23) 0. 079 (2. 00) 1. 654 (42. 00) Figure 7. ST9235A and ST9235AG mounting dimensions (MCC mounting version) 18 ST9235 Family Product Manual, Rev. B Dimensions are in inches (mm) 0. 750 (19. 05) max 0. 230 ± 0. 010 (5. 84 ± 0. 25) 0. 000 4X 3 mm × 0. 5 mm 0. 15 in. (3. 81 mm) min full thread 1. 227 ± 0. 025 (31. 17 ± 0. 64) 4. 010 (101. 85) max 0. 152 ± 0. 005 (3. 86 ± 0. 13) 1. 500 ± 0. 010 (38. 10 ± 0. 25) 0. 000 1. 375 ± 0. 015 (34. 93 ± 0. 38) 0. 155 ± 0. 025 (3. 94 ± 0. 64) 0. 000 0. 275 ± 0. 025 (6. 99 ± 0. 64) 2. 760 (70. 10) max 2. 430 ± 0. 020 (61. 72 ± 0. 51) 4X 3 mm × 0. 5 mm 0. 15 in (3. 81 mm) min full thread Pin 20 removed for keying 0. 079 (2. 00) Pin 1 0. 166 ± 0. 015 (4. 22 ± 0. 38) 0. 079 (2. 00) 1. 654 (42. 00) Figure 8. ST9235A and ST9235AG mounting dimensions (non-MCC mounting version) ST9235 Family Product Manual, Rev. B 19 3. 0 ATA interface The ST9235 family drives use the industry-standard ATA task file interface. The drives support both 8-bit and 16-bit data transfers and have no DMA capability. All data transfers are done through programmed I/O. Refer to the Seagate ATA Interface Specification, publication number 36111-001. Up to two drives can be daisy-chained (assigning master and slave drives) on the same host bus. 3. 1 Drive configuration 3. 1. 1 Master/slave selection A master/slave relationship must be established between drives on the AT bus using the drive jumpers. Drive 1 is configured as the master and Drive 2 is configured as the slave. Refer to the table below and Figures 9 through 11 on pages 20 through 22 for user-configuration jumper settings to configure a drive as a master or a slave. Jumper for pins A and B Removed Removed Installed Installed Jumper for pins C and D Removed Installed Removed Installed Configuration Drive is master; no slave drive present Drive is master; Seagate slave drive present Drive is slave; Seagate master drive present Reserved position--do not use 3. 1. 2 Remote LED The drive indicates activity to the host through the DASP­ line (pin 39) on the ATA interface. This line may be connected to a drive status indicator driving an LED at 5V. The line has a 30 mA nominal current limit. 20 ST9235 Family Product Manual, Rev. Drive is shown with circuit board up. Master/slave Pin 1 configuration jumpers Pin 20 removed for keying Circuit board B A D C Drive is master; no slave present Drive is master; Seagate slave drive present Drive is slave; Seagate master drive present Reserved positions (do not use) Figure 9. ST9080A connector setup ST9235 Family Product Manual, Rev. Drive is shown with circuit board up. Master/slave Pin 1 configuration jumpers Pin 20 removed for keying Circuit board B A D C Drive is master; no slave present Drive is master; Seagate slave drive present Drive is slave; Seagate master drive present Reserved positions (do not use) Figure 10. ST9145A and ST9145AG connector setup 22 ST9235 Family Product Manual, Rev. Drive is shown with circuit board up. Master/slave Pin 1 configuration jumpers Pin 20 removed for keying Circuit board B A D C Drive is master; no slave present Drive is master; Seagate slave drive present Drive is slave; Seagate master drive present Reserved positions (do not use) Figure 11. ST9235A and ST9235AG connector setup ST9235 Family Product Manual, Rev. [. . . ] When the drive receives this command, it sets BSY, switches to Idle mode, and enables or disables the idle timer according to the value placed in the Sector Count register. The drive then clears BSY and generates an interrupt. If the value in the sector count is zero, the idle timer is disabled and the drive does not automatically switch to Idle mode. If the value is not zero, the drive switches to Idle mode after the specified delay time has elapsed. [. . . ]