DESCRIPTION

The μPD754264 is a 4-bit single-chip microcontroller which incorporates the EEPROMTM for key-less entry application.

It incorporates a 32 × 8-bit EEPROM, a CPU performing operation, a 4-Kbyte mask ROM to store software, a 128 × 4-bit RAM to store the operation data, an 8-bit resolution A/D converter, and a carrier generator which easily outputs waveforms for infrared remote controller.

The details of functions are described in the following user’s manual. Be sure to read it before designing.

FEATURES

? On-chip EEPROM: 32 × 8 bits (mapped to the data memory)

? On-chip key return reset function for key-less entry

? On-chip low-voltage A/D converter (AVREF = 1.8 to 6.0 V), 8-bit resolution × 2 channels

? Low-voltage operation: VDD = 1.8 to 6.0 V

? Timer function (4 channels)

? Basic interval timer/watchdog timer : 1 channel

? 8-bit timer counter : 3 channels

? On-chip memory

? Program memory (ROM)

4096 × 8 bits

? Data memory (static RAM)

128 × 4 bits

? Instruction execution time variable function suited for high-speed operation and power saving.

0.95, 1.91, 3.81, 15.3 μs (@ fX = 4.19-MHz operation)

0.67, 1.33, 2.67, 10.7 μs (@ fX = 6.0-MHz operation)

APPLICATIONS

Automotive appliances such as key-less entry, compact data carrier, etc.