SAA5355 Description
SAA5355 The SAA5355 FTFROM (Five-Two-Five-ROM) is a single-chip VLSI NMOS crt controller capable of handling the display functions required for a 525-line, level-3 videotex decoder. Only minimal hardware is required to produce a videotex terminal using FTFROM the simplest configuration needs just a microcontroller and 4 Kbytes of display memory.
SAA5355 Key Features
- Minimal additional hardware required
- Screen formats of 40/80 character by 1-to-25 row display
- 512 alphanumeric or graphical characters on-chip or extendable off-chip
- Serial attribute storage (STACK) and parallel attribute storage
- Dynamically redefinable character (DRCS) capability over full field
- Interfaces with 8/16-bit microprocessors with optional direct memory access
- On-chip scroll map minimizes data to be transferred when scrolling
- 32 on-screen colours redefinable from a palette of 4096
- Three on-chip digital-to-analogue converters which pensate for crt non-linearity
- Memory interface capable of supporting multi-page terminals. FTFROM can access up to 128 Kbytes of display memory