General Description
The HT46R62/HT46C62 are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for A/D product applications that interface directly to analog signals and which require LCD Interface. The mask version HT46C62 is fully pin and functionally compatible with the OTP version HT46R62 device.
The advantages of low power consumption, I/O flexibil ity, timer functions, oscillator options, multi-channel A/D Converter, Pulse Width Modulation function, HALT and wake-up functions, in addition to a flexible and configurable LCD interface enhance the versatility of these devices to control a wide range of applications requiring analog signal processing and LCD interfacing, such as electronic metering, environmental monitoring, handheld measurement tools, motor driving, etc., for both industrial and home appliance application areas.

Features
• Operating voltage:
   fSYS=4MHz: 2.2V~5.5V
   fSYS=8MHz: 3.3V~5.5V
• 20 bidirectional I/O lines
   (PA, PB0~PB5, PD0~PD2, PD4~PD6)
• Two external interrupt input
• One 8-bit programmable timer/event counter with
PFD (programmable frequency divider) function
• LCD driver with 20x3 or 19x4 segments (logical output option for SEG0~SEG15)
• 2Kx14 program memory
• 88x8 data memory RAM
• Supports PFD for sound generation
• 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
• 6 channels 9-bit resolution A/D converter
• 3-channel 8-bit PWM output shared with 3 I/O lines
• Bit manipulation instruction
• 16-bit table read instruction
• Up to 0.5μs instruction cycle with 8MHz system clock
• 63 powerful instructions
• All instructions in 1 or 2 machine cycles
• Low voltage reset/detector function
• 52-pin QFP, 56-pin SSOP packages