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SMC032AF Datasheet(PDF) 53 Page - Numonyx B.V |
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SMC032AF Datasheet(HTML) 53 Page - Numonyx B.V |
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53 / 82 page  SMCxxxAF CF-ATA command description 53/82 9.2 Execute Drive Diagnostic command (90h) This command performs the internal diagnostic tests implemented by the card. In PCMCIA configuration, this command only runs on the card which is addressed by the drive/head register when the command is issued. This is because PCMCIA card interface does not allow for direct inter-drive communication. In True IDE mode, the Drive bit is ignored and the diagnostic command is executed by both the master and the slave with the master responding with the status for both devices. Table 48 defines the Execute Drive Diagnostic command byte sequence. The diagnostic codes shown in Table 49 are returned in the error register at the end of the command. Table 48. Execute Drive Diagnostic Bit 7 6 543 2 1 0 Command (7) 90h C/D/H (6) X Drive X Cyl High (5) X Cyl Low (4) X Sect Num (3) X Sect Cnt (2) X Feature (1) X Table 49. Diagnostic codes Code Error type 01h No error detected 02h Formatter device error 03h Sector buffer error 04h ECC circuitry error 05h Controlling microprocessor error 8Xh Slave error in True IDE mode |
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