| Part Number | AT89S54 |
| Manufacturer | ATMEL |
| Title | 8-bit Flash Microcontroller |
| Description | Features • 80C52 Compatible – 8051 Instruction Compatible – Six 8-bit I/O Ports (64 Pins or 68 Pins Versions) – Four 8-bit I/O Ports (44 Pins Vers... |
| Features |
• 80C52 Compatible – 8051 Instruction Compatible – Six 8-bit I/O Ports (64 Pins or 68 Pins Versions) – Four 8-bit I/O Ports (44 Pins Version) – Three 16-bit Timer/Counters – 256 Bytes Scratch Pad RAM – 9 Interrupt Sources with 4 Priority Levels • Int... |
| Datasheet |
 AT89S54 Datasheet
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