AN-764 Overview
Description
With the introduction of the MC6852 SSDA, the task of interfacing synchronous serial peripherals such as floppy disks, tape cassettes or cartridges, and bi-sync or HDLC data channels, has been reduced significantly. Described in this application note is an efficient and flexible floppy disk controller design.
Key Features
- Controller operates one to four daisy-chained drives
- Four drive radial configuration possible with addi- tional multiplexing
- Flexible drive interfacing
- MPU controls data transfer allowing
- Store only desired data from a sector into memory
- Search disk for pattern match without transferring data into memory until pattern is found
- Read or write entire track in one revolution; consecutive tracks on consecutive revolutions
- DMA not required when using host MPU
- Interrupt MPU system operations on address mark match to start operations, allowing increased throughput
- Seek interlaced with R/W when using radial configuration
