26 Jun
2012
26 Jun
'12
10:12 a.m.
On 6/26/12 9:49 AM, Dave McGuire wrote:
I would think that a bit of analog hardware could
generate the signals
to mimic flux transitions.
Read write are differential TTL levels, MFM or RLL encoded. Clock recovery
on read generally uses a PLL.
National app note
AN-0413_Disk_Interface_Design_Guide_and_Users_Manual_Jan86
gives a decent overview of the different drive interfaces circa 1986.
AN-0414_Precautions_for_Disk_Data_Separator_PLL_Designs_Feb86
AN-0581_Application_Issues_for_the_DP8465_Family_of_Data_Synchronizers_Jan89
AN-0494_Designing_with_the_DP8462.pdf
AN-0500_Designing_an_ESDI_Disk_Controller_Subsystem_with_Nationals_DP8466A_Nov87.pdf
AN-0415_Designing_with_the_DP8461_Apr85.pdf
AN-0501_Interfacing_Nationals_DP8466A_to_the_SMD_Interface_Standard_Mar87.pdf
are also of interest