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General Description

The HT47R20A-1/HT47C20-1 are 8-bit, high performance, RISC architecture microcontroller devices specifically designed for applications that interface directly to analog signals, such as those from sensors. The mask version HT47C20-1 is fully pin and functionally compatible with the OTP version HT47R20A-1 device.

Features

? Operating voltage: 2.2V~5.5V

? Eight bidirectional I/O lines

? Four input lines

? One interrupt input

? One 16-bit programmable timer/event counter with PFD (programmable frequency divider) function

? On-chip crystal and RC oscillator for system clock

? One 32.768kHz crystal oscillator for real time clock or system clock

? Watchdog Timer

? 2Kx16 program memory

? 64x8 data memory RAM

? One Real Time Clock (RTC)

? One 8-bit prescaler for RTC

? One low voltage detector

? One low voltage reset circuit

? One buzzer output

? HALT function and wake-up feature reduce power consumption

? LCD bias C type or R type

? One LCD driver with 20x2,20x3 or 19x4 segments

? One IR carrier output

? Two channels RC type A/D converter

? Four-level subroutine nesting

? Bit manipulation instruction

? 16-bit table read instruction

? Up to 1μs instruction cycle with 4MHz system clock

? All instructions in one or two machine cycles

? 63 powerful instructions

? 64-pin LQFP package