General Description
The HT48RA0-3/HT48CA0-3 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications. The mask version HT48CA0-3 is fully pin and functionally compatible with the OTP version HT48RA0-3 device.

Features
• Operating voltage: fSYS=4MHz(3%) at 2.0V~3.6V, Temperature = 0°C ~ +50°C
• 10 bidirectional I/O lines
• 6 Schmitt trigger input lines (PB7 without Pull-high resistor)
• One programmable carrier output - using 9-bit timer
• On-chip RC oscillator - 4MHz 3% when VDD=2.0V~3.6V; Temperature = 0°C ~ +50°C
• Watchdog Timer
• 1Kx14 program memory
• 32x8 data RAM
• Power-down and wake-up features reduce power consumption
• 62 powerful instructions
• Up to 1μs instruction cycle with 4MHz system clock
• All instructions executed in 1 or 2 machine cycles
• 14-bit table read instructions
• One-level subroutine nesting
• Bit manipulation instructions
• Low voltage reset function
• 20-pin SOP/SSOP package