HT47R20A-1

` 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
` 2K*16 program memory
` 64*8 data memory RAM
` One Real Time Clock (RTC)
` Oe 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
` OneLCDdriver with20*2,20*3or19*4segments
` 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 1s instruction cycle with 4MHz system clock
` All instructions in oneor two machine cycles
` 63 powerful instructions
` 64-pin QFP package

Supply Voltage ...........................V_SS-0.3V to V_SS+6.0V
Storage Temperature ............................-50 to 125
Input Voltage.............................V_SS-0.3V to V_DD+0.3V
Operating Temperature...........................-40 to 85
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

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 device.

The advantages of low power consumption, I/O flexibility programmable frequency divider, timer functions, oscillator options, 2-channel RC type A/D Converter, LCD driver, HALT and wake-up functions, enhance the versatility of these devices HT47R20A-1 to suit a wide range of Resistor to Frequency application possibilities such as sensor signal processing, remote metering, industrial control, consumer products, subsystem controllers, etc.