General Description

The HT46R321 is 8-bit, high performance, RISC architecture microcontroller devices. With their fully integrated A/D converter they are especially suitable for applications which interface to analog signals, such as those from sensors. The addition of an internal operational amplifier/comparator and PWM modulation functions further adds to the analog capability of these devices.

Features

• Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

• 21 bidirectional I/O lines (max.)

• support 84 LED driver

• Single interrupt input shared with an I/O line

• 8-bit programmable timer/event counter with overflow interrupt

• Integrated crystal and RC oscillator

• Watchdog Timer

• 204815 Program Memory capacity

• 888 Data Memory capacity

• Integrated PFD function for sound generation

• Power-down and wake-up functions reduce power consumption

• Up to 0.5μs instruction cycle with 8MHz system clock at VDD=5V

• 6-level subroutine nesting

• 6 channel 12-bit resolution A/D converter

• Integrated single operational amplifier or comparator selectable via configuration option

• Peripheral clock output  PCK

• Dual 8-bit PWM outputs shared with I/O lines

• Bit manipulation instruction

• Full table read instruction

• 63 powerful instructions

• All instructions executed in one or two machine cycles

• Low voltage reset function

• 28-pin SKDIP/SOP/SSOP packages