General Description
The HT46R48 are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for A/D applications that interface directly to analog signals, such as those from sensors.

Features
• Operating voltage:
    fSYS=4MHz: 2.2V~5.5V
    fSYS=8MHz: 3.3V~5.5V
• 19 bidirectional I/O lines (max.)
• 1 interrupt input shared with an I/O line
• 8-bit programmable timer/event counter with overflow interrupt and 7-stage prescaler
• On-chip crystal and RC oscillator
• Watchdog Timer
• 204814 program memory
• 648 data memory RAM
• Supports PFD for sound generation
• HALT function and wake-up feature reduce power consumption
• Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V
• 6-level subroutine nesting
• 4 channels 9-bit resolution A/D converter
• 1 channel 8-bit PWM output shared with an I/O line
• Bit manipulation instruction
• 14-bit table read instruction
• 63 powerful instructions
• All instructions in one or two machine cycles
• Low voltage reset function
• 24-pin SKDIP/SOP/SSOP package