Fujitsu MHM2200AT Manual/User Guide - Page 128
Fujitsu MHM2200AT - Mobile 20 GB Hard Drive Manual
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5.3 Host Commands At command issuance (I/O registers setting contents) 1F7H(CM) 1 1 1 1 1 0 0 0 1F6H(DH) x L x DV xx 1F5H(CH) xx 1F4H(CL) xx 1F3H(SN) xx 1F2H(SC) xx 1F1H(FR) xx At command completion (I/O registers contents to be read) 1F7H(ST) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(ER) Status information x x x DV Max head/LBA [MSB] Max. cylinder [MSB]/Max. LBA Max. cylinder [LSB]/Max. LBA Max. sector/Max. LBA [LSB] xx Error information (18) EXECUTE DEVICE DIAGNOSTIC (X'90') This command performs an internal diagnostic test (self-diagnosis) of the device. This command usually sets the DRV bit of the Drive/Head register is to 0 (however, the DV bit is not checked). If two devices are present, both devices execute self-diagnosis. If device 1 is present: • Both devices shall execute self-diagnosis. • The device 0 waits for up to 5 seconds until device 1 asserts the PDIAGsignal. • If the device 1 does not assert the PDIAG- signal but indicates an error, the device 0 shall append X'80' to its own diagnostic status. • The device 0 clears the BSY bit of the Status register and generates an interrupt. (The device 1 does not generate an interrupt.) • A diagnostic status of the device 0 is read by the host system. When a diagnostic failure of the device 1 is detected, the host system can read a status of the device 1 by setting the DV bit (selecting the device 1). C141-E104-03EN 5-51