UM9228-1 Overview
The UM9228-1 is an CMOS integrated circuit desi~ned to plement the 765A (8272A) type of floppy disk controller chip; It incorporates a data separator, write prepensation logic, and DMA interface logic. A -FDC 765A together with UM9228-1 and some buffers qrive and decoder can be formed a IBM PC diskette adapter.
UM9228-1 Key Features
- Floppy Data Separator Performs plete data separation function with a little external circuit for floppy disk drives Sepa
- Early and late 250 ns write prepensation
- External 16 MHz clock required
- patible with the FOC 765A (8272A) floppy disk controllers
- DMA inte"rface logic
- CMOS technology
- Single + 5 Volt supply
- TT L patible
- For IBM PC disk drives especially