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    • 87. 发明授权
    • Magnetic disk apparatus with circuit capable of identifying individual
specification
    • 带电路的磁盘设备,能够识别各种规格
    • US5986842A
    • 1999-11-16
    • US951192
    • 1997-10-15
    • Akira MatsumotoTeruyuki Narita
    • Akira MatsumotoTeruyuki Narita
    • G11B5/09G11B5/00G11B5/012G11B19/12G11B25/04G11B33/10G11B15/18
    • G11B25/043G11B19/12G11B33/10G11B2005/001G11B2005/0013G11B5/012
    • A magnetic disk apparatus is disclosed, in which the product specifications such as the number of heads, the number of disks and the information on the destination of the apparatus can be efficiently, accurately identified by a single circuit. The magnetic disk apparatus comprises an identification circuit that can identify the performance specification information. The identification circuit includes a first resistor circuit arranged on a cable connecting a head actuator and a printed board, a second resistor circuit formed on the printed board and having an end thereof connected to a reference voltage and the other end thereof connected in series to the first resistor circuit, an A/D converter for converting the voltage value at the junction point of the first and second resistor circuits into a digital value of a predetermined number of bits, and a memory for storing in advance the performance specification information and the control information of the magnetic disk apparatus corresponding to a digital value of a predetermined number of bits. The control circuit on the printed board can thus control the magnetic disk apparatus by judging the performance specification information of the magnetic disk apparatus from the output value of the A/D converter and the value stored in the memory.
    • 公开了一种磁盘装置,其中可以通过单个电路精确地识别诸如磁头数量,磁盘数量和设备目的地信息的产品规格。 磁盘装置包括能够识别性能规格信息的识别电路。 识别电路包括布置在连接头致动器和印刷电路板的电缆上的第一电阻器电路,形成在印刷电路板上并具有连接到参考电压的一端的第二电阻器电路,并且其另一端与 第一电阻器电路,用于将第一和第二电阻器电路的连接点处的电压值转换为预定位数的数字值的A / D转换器,以及用于预先存储性能指定信息和控制的存储器 对应于预定位数的数字值的磁盘装置的信息。 因此,印刷电路板上的控制电路可以通过从A / D转换器的输出值和存储在存储器中的值判断磁盘装置的性能指定信息来控制磁盘装置。