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General Description

The HT48R70A-1/HT48C70-1 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications. The mask version HT48C70-1 is fully pin and functionally compatible with the OTP version HT48R70A-1 device.

Features

? Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

? Low voltage reset function

? 56 bidirectional I/O lines (max.)

? 1 interrupt input

? 216-bit programmable timer/event counter and overflow interrupts

? On-chip RC oscillator, external crystal and RC oscillator

? 32768Hz crystal oscillator for timing purposes only

? Watchdog Timer

? 819216 program memory ROM

? 2248 data memory RAM

? Buzzer driving pair and PFD supported

? HALT function and wake-up feature reduce power consumption

? 16-level subroutine nesting

? Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V

? Bit manipulation instruction

? 16-bit table read instruction

? 63 powerful instructions

? All instructions in one or two machine cycles

? 48-pin SSOP, 64-pin QFP package