General Description
The HT46R65/HT46C65 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 HT46C65 is fully pin and functionally compatible with the OTP version HT46R65 device.

FEATUREs
• Operating voltage:
   fSYS=4MHz: 2.2V~5.5V
   fSYS=8MHz: 3.3V~5.5V
• 24 bidirectional I/O lines
• Two external interrupt input
• Two 16-bit programmable timer/event counter with PFD (programmable frequency divider) function
• LCD driver with 41x3 or 40x4 segments (logical output option for SEG0~SEG23)
• 8Kx16 program memory
• 384x8 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
• 16-level subroutine nesting
• 8 channels 10-bit resolution A/D converter
• 4-channel 8-bit PWM output shared with 4 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, 100-pin QFP packages