UPD754144 Overview
The µ PD754244 is a 4-bit single-chip microcontroller which incorporates the EEPROMTM for key-less entry application. It incorporates a 16 × 8-bit EEPROM, a 4-Kbyte mask ROM to store software, a 128 × 4-bit RAM to store the processing data, a processing CPU, and a carrier generator which easily outputs waveforms for infrared remote controller. The details of functions are described in the following user’s manual.
UPD754144 Key Features
- µ PD754144: RC oscillator (external resistor and capacitor)
- µ PD754244: Crystal/ceramic oscillator Low-voltage operation: V DD = 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 power saving