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