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General Description

The HT46R24/HT46C24 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. The mask version HT46C24 is fully pin and functionally compatible with the OTP version HT46R24 device.

Features

? Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

? 40 bidirectional I/O lines (max.)

? 1 interrupt input shared with an I/O line

? Two 16-bit programmable timer/event counter with overflow interrupt

? On-chip crystal and RC oscillator

? Watchdog Timer

? 819216 program memory

? 3848 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

? 16-level subroutine nesting

? 8 channels 10-bit resolution A/D converter

? 4-channel 8-bit PWM output shared with four I/O lines

? Bit manipulation instruction

? 16-bit table read instruction

? 63 powerful instructions

? All instructions in one or two machine cycles

? Low voltage reset function

? I2C Bus (slave mode)

? 28-pin SKDIP/SOP, 48-pin SSOP package