Fdd Operation; 10.2.1. Basic Operation; Interface Between Cbic (#8) And Fdc (#5); Fig.2.26 Fdd Block Diagram - Brother DP-525CJ Service Manual

SERVICE MANUAL
10.2.

FDD Operation

10.2.1. Basic Operation

CBIC(#8) writes commands to FDC(#5), and the FDC(#5) controls the FDD in
accordance with these commands and reads/writes data.
See Fig. 2.26.

10.2.2. Interface between CBIC (#8) and FDC (#5)

If CBIC(#8) accesses an internal register other than the data resister in FDC (#5), the
normal read/write operation will be performed.
If CBIC(#8)transmits data to or receives data from FDC (#5), DMA communications will
be performed using the DMA function of CBIC(#8).
CBIC(#8) resets FDC(#5),detects the density signal which indicates whether the floppy
disk is a 2DD or 2HD, and output to FDC(#5).

Fig.2.26 FDD Block Diagram

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THEORY
Electrical