General Description
   The HT46RU75D-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, UART function, HALT and wake-up functions, watchdog timer, as well as low cost, provide the flexibility to suit 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
• 18 bidirectional I/O lines and two ADC inputs
• Single external interrupt input shared with I/O line
• One 16-bit and one 18-bit programmable timer/event
   counter with overflow interrupt and prescaler
• LCD driver with 404, 413 or 412 segments
• 8K16 program memory with partial lock function
• 1608 data memory RAM
• Four differential input channel dual slope Analog to
   Digital Converter with Operational Amplifier
• Watchdog Timer with regulator power supply
• Buzzer output
• External 32768Hz RTC oscillator
• Integrated RC or crystal oscillator
• Power-down and wake-up functions reduce power
   consumption
• Voltage regulator (3.3v) and charge pump
• Embedded voltage reference generator (1.5V)
• 16-level subroutine nesting
• Universal Asynchronous Receiver Transmitter -
   UART
• Bit manipulation instruction
• 16-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
• 100-pin QFP package