General Description
   The HT46R73D-1 is an 8-bit high performance, RISC architecture microcontroller device specifically designed for A/D with LCD applications that interface directly to analog signals, such as those from sensors. The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Dual slope A/D converter, LCD display, HALT and wake-up functions, watchdog timer, as well as low cost, enhance the versatility of these devices to suit for a wide range of AD with LCD application possibilities such as sensor signal processing, scales, consumer products, subsystem controllers, etc.

FEATUREs
• Operating voltage:
   fSYS=4MHz: 2.2V~5.5V
   fSYS=8MHz: 3.3V~5.5V
• 12 bidirectional I/O lines and two ADC input
• One external interrupt input shard with an I/O lines
• One 8-bit and one 16-bit programmable timer/event
   counter with overflow interrupt a 7-stage pre-scalar
• LCD driver with 164, 173 or 172 segments
• 4K15 program memory with partial lock function
• 968 data memory RAM
• Single differential input channel dual slope Analog to
   Digital Converter with Operational Amplifier.
• Watchdog Timer with regulator power
• Buzzer output
• Internal 12kHz RC oscillator
• On-chip RC or crystal oscillator
• HALT function and wake-up feature reduce power
   consumption
• Voltage regulator (3.3V) and charge pump
• Embeded voltage reference generator (1.5V)
• 4-level subroutine nesting
• Bit manipulation instruction
• 14-bit table read instruction
• Up to 0.5s instruction cycle with 8MHz system clock
   at VDD=5V
• 63 powerful instructions
• All instructions in 1 or 2 machine cycles
• Low voltage reset/detector function
• 52-pin QFP package