General Description
The HT48R70A-1/HT48C70-1 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications. The mask version HT48C70-1 is fully pin and functionally compatible with the OTP version HT48R70A-1 device.

Features
• Operating voltage:
    fSYS=4MHz: 2.2V~5.5V
    fSYS=8MHz: 3.3V~5.5V
• Low voltage reset function
• 56 bidirectional I/O lines (max.)
• 1 interrupt input
• 216-bit programmable timer/event counter and overflow interrupts
• On-chip RC oscillator, external crystal and RC oscillator
• 32768Hz crystal oscillator for timing purposes only
• Watchdog Timer
• 819216 program memory ROM
• 2248 data memory RAM
• Buzzer driving pair and PFD supported
• HALT function and wake-up feature reduce power consumption
• 16-level subroutine nesting
• Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V
• Bit manipulation instruction
• 16-bit table read instruction
• 63 powerful instructions
• All instructions in one or two machine cycles
• 48-pin SSOP, 64-pin QFP package