Hitachi C4K60 Specifications - Page 55

7.5. Command Descriptions 7.5.1. Check Power Mode [98h, E5h] Task File Register 7 6 5 4 3 2 1 0 Command 98h or E5h LBA High XX LBA Mid XX LBA Low XX Device/Head X X X DRV X X X X Sector Count XX Features XX This command posts the power mode of the device. If the device is in, going into, or recovering from the Standby Mode, the device sets BSY bit and set the Sector Count Register to 00h. The device then clears BSY and generates an interrupt. If the device is in the Idle Mode, the device sets BSY, set the Sector Count Register to FFh, clear BSY, and generate an interrupt. If the device is in the Active Mode, the device sets BSY, set the Sector Count Register to FFh, clear BSY, and generate an interrupt. 7.5.2. Device Configuration Identify [B1h, Sub 02h] Task File Register 7 6 5 4 3 2 1 0 Command B1h LBA High XX LBA Mid XX LBA Low XX Device/Head X X X DRV X X X X Sector Count XX Features 02h The DEVICE CONFIGURATION IDENTIFY command returns a 512 byte data structure via PIO data-in transfer. The content of this data structure indicates the selectable commands, modes, and feature sets that the device is capable of supporting. If a DEVICE CONFIGURATION SET command has been issued reducing the capabilities, the response to an IDENTIFY DEVICE command will reflect the reduced set of capabilities, while the DEVICE CONFIGURATION IDENTIFY command will reflect the entire set of selectable capabilities. The format of the Device Configuration Overlay data structure is shown in Table 7.5. If the device has executed a previous DEVICE CONFIGURATION FREEZE LOCK command since powerup, this device returns command aborted. K6610170 Rev.2 Dec 22, 2004 - 55 -