General Description

The HT46R4A is a device from the Cost-Effective A/D Type Series of MCUs. As an 8-bit high performance RISC architecture microcontroller, the device is designed especially for applications that interface directly to analog signals, such as those from sensors. The devices include an integrated multi-channel Analog to Digital Converter in addition to two Pulse Width Modulation outputs.

Features

? Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

? Max of 27 bidirectional I/O lines

? External interrupt input shared with I/O line

? Two 8-bit programmable Timer/Event Counters with

overflow interrupt

? Integrated crystal and RC oscillator

? Watchdog Timer

? 409x15 program memory

? 192x8 data memory

? PFD for audio frequency generation

? Power down and wake-up functions to reduce power

consumption

? Up to 0.5μs instruction cycle with 8MHz system clock

at VDD=5V

? 6-level subroutine nesting

? 6 channel 9-bit resolution A/D converter

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

? Bit manipulation instruction

? Table read instructions

? 63 powerful instructions

? All instructions executed in one or two machine

cycles

? Low voltage reset function

? 28-pin SKDIP/SOP, 32-pin DIP, 44-QFP package