General Description
The HT49C50 is an 8-bit high performance single chip microcontroller. Its single cycle instruction and two-stage pipeline architecture make it suitable for high speed applications. The device is suited for use in multiple LCD low power applications among which are calculators, clock timers, games, scales, leisure products, other hand held LCD products, and battery system in particular.

Features
• Operating voltage: 2.2V~5.2V
• 8 input lines
• 12 bidirectional I/O lines
• Two external interrupt input
• Two 8-bit programmable timer/event counter with PFD (programmable frequency divider) function
• LCD driver with 33  3 or 32  4 segments
• 4K  15 program memory ROM
• 160  8 data memory RAM
• Real Time Clock (RTC)
• 8-bit prescaler for RTC
• Watchdog timer
• Buzzer output
• On-chip crystal and RC oscillator
• Halt function and wake-up feature reduce power consumption
• 6-level subroutine nesting
• Bit manipulation instruction
• 15-bit table read instruction
• Up to 1μs instruction cycle with 4MHz system clock
• 63 powerful instructions
• All instructions in 1 or 2 machine cycles
• 80/100-pin QFP package