UPD754244GS-XXX-GJG-A中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

FEATURES

? On-chip EEPROM: 16 × 8 bits (mapped to the data memory)

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

? System clock oscillation circuit

? uPD754144: RC oscillator (external resistor and capacitor)

? uPD754244: Crystal/ceramic oscillator

? 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 power saving.

? uPD754144:

4, 8, 16, 64 μs (at fcc = 1.0-MHz operation)

? uPD754244:

0.95, 1.91, 3.81, 15.3 μs (at fx = 4.19-MHz operation)

0.67, 1.33, 2.67, 10.7 μs (at fx = 6.0-MHz operation)