Hitachi 7K400 Specifications - Page 134
Download Microcode 92h
UPC - 000053412935
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12.4 Download Microcode (92h) Table 83: Download Microcode Command (92h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature 0 0 0 0 0 1 1 1 Sector Count Sector_Count (00-07) Sector Number Sector Number (08-15) Cylinder Low Cylinder High Device/Head - - - D - - - - Command 1 0 0 1 0 0 0 0 76 CRC UNC 0V Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 00 0 V 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 101 0 0 - V Output Parameters To The Device Feature Sector Count Sector Number Subcommand code. Only support 07h which indicates that save downloaded code for immediate and future use. Lower byte of 16-bit sector count value to transfer from the host. Higher byte of 16-bit sector count value to transfer from the host. This command enables the host to alter the device's microcode. The data transferred using the DOWNLOAD MICROCODE commands is vendor specific. All transfers shall be an integer multiple of the sector size. The size of the data transfer is determined by the contents of the Sector Number and Sector Count registers. The Sector Number register is used to extend the Sector Count register to create a 16-bit sector count value. The Sector Number register is the most significant eight bits and the Sector Count register is the least significant eight bits. A value of zero in both the Sector Number and Sector Count registers shall indicate no data is to be transferred. ABT will be set to 1 in the Error Register if the value in the Feature register is not 07h or the device is in Security Locked mode. When the reload of new microcode is requested in the data sent by the host for this Download command, UNC error will be set to 1 in the Error Register if the device fails to reload new microcode. This error is reported only when the reload of microcode is requested. In reloading new microcode, the device does not preserve its state and settings but reset them just like the device is executing a power-on. For instance, the device does DASP handshake in reloading new microcode. Thus the device does not recognize the slave device even though it exists. Also when the spin-up of the device is disabled, the device spin down after reloading new microcode. Deskstar 7K400 Hard Disk Drive Specification 120