General Description
The HT49R50A-1/HT49C50-1/HT49C50L are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for a wide range of LCD applications. The mask version HT49C50-1 and HT49C50L are fully pin and functionally compatible with the OTP version HT49R50A-1 device. The HT49C50L is a low voltage version, with the ability to operate at a minimum power supply of 1.2V, making it suitable for single cell battery applications.

FEATUREs
• Operating voltage:
    fSYS=4MHz: 2.2V~5.5V for HT49R50A-1/HT49C50-1
    fSYS=8MHz: 3.3V~5.5V for HT49R50A-1/HT49C50-1
    fSYS=500kHz: 1.2V~2.2V for HT49C50L
• 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 33x2, 33x3 or 32x4 segments
• 4Kx15 program memory
• 160x8 data memory RAM
• Real Time Clock (RTC)
• 8-bit prescaler for RTC
• Watchdog Timer
• Buzzer output
• On-chip crystal, RC and 32768Hz crystal oscillator
• HALT function and wake-up feature reduce power consumption
• 6-level subroutine nesting
• Bit manipulation instruction
• 15-bit table read instruction
• Up to 0.5μs instruction cycle with 8MHz system clock for HT49R50A-1/HT49C50-1
• Up to 8μs instruction cycle with 500kHz system clock for HT49C50L
• 63 powerful instructions
• All instructions in 1 or 2 machine cycles
• Low voltage reset/detector function for HT49R50A-1/HT49C50-1
• 48-pin SSOP, 64-pin LQFP and 100-pin QFP packages