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AT89S64 - 8-bit Flash Microcontroller

Download the AT89S64 datasheet PDF. This datasheet also covers the AT89S54 variant, as both devices belong to the same 8-bit flash microcontroller family and are provided as variant models within a single manufacturer datasheet.

Key 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.
  • Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply (AT89S64 Only).
  • ISP (In-System Programming) Using Standard VCC Power Supply.
  • 2048 Bytes Boot ROM Cont.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AT89S54-ATMEL.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
AT89S2051 8-bit Microcontroller ATMEL Corporation
AT89S4051 8-bit Microcontroller ATMEL Corporation
AT89S4D12 8-Bit Microcontroller with 132K Bytes Flash Data Memory ATMEL Corporation
AT89S51 8-bit Microcontroller ATMEL Corporation
AT89SND2CMP3B Single-Chip Flash Microcontroller ATMEL Corporation

Other Datasheets by Atmel (now Microchip Technology)

Part Number Description
AT89S52 8-bit Microcontroller
AT89S53 8-bit Microcontroller
AT89S54 8-bit Flash Microcontroller
AT89S58 8-bit Flash Microcontroller
AT89S8252 8-bit Microcontroller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 • Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply (AT89S64 Only) • ISP (In-System Programming) Using Standard VCC Power Supply • 2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default Serial Loader • High-speed Architecture – In Standard Mode: 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution) 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only) – In X2 mode (6 Clocks/machine cycle) 20 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution) 30 MHz (Vcc 4.