General Description
The HT48R10A-1/HT48C10-1 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications. The mask version HT48C10-1 is fully pin and functionally compatible with the OTP version HT48R10A-1 device.

Features
• Operating voltage:
    fSYS=4MHz: 2.2V~5.5V
    fSYS=8MHz: 3.3V~5.5V
• Low voltage reset function
• 21 bidirectional I/O lines (max.)
• 1 interrupt input shared with an I/O line
• 8-bit programmable timer/event counter with overflow interrupt and 8-stage prescaler
• On-chip external crystal, RC oscillator and internal RC oscillator
• 32768Hz crystal oscillator for timing purposes only
• Watchdog Timer
• 102414 program memory ROM
• 648 data memory RAM
• Buzzer driving pair and PFD supported
• HALT function and wake-up feature reduce power consumption
• Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V
• All instructions in one or two machine cycles
• 14-bit table read instruction
• 4-level subroutine nesting
• Bit manipulation instruction
• 63 powerful instructions
• 24-pin SKDIP/SOP package