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