General Description

The HT46R005 and HT48R005 are a series of 8-bit high performance, RISC architecture microcontrollers specifically designed for a wide range of applications. The usual Holtek microcontroller features of low power consumption, I/O flexibility, timer functions, oscillator options, power down and wake-up functions, watchdog timer and low voltage reset, combine to provide devices with a huge range of functional options while still maintaining a high level of cost effectiveness.

CPU Features

Operating voltage:

   fSYS= 12MHz: 2.2V~5.5V

   fSYS= 16MHz: 3.0V~5.5V

Up to 0.33s instruction cycle with 12MHz system clock at VDD=5V

Sleep mode and wake-up functions to reduce power consumption

Oscillator types:

  External high freuency Crystal -- HXT

  External RC -- ERC

  Internal RC -- HIRC

Two operational modes: Normal, Sleep

Fully integrated internal 4MHz, 8MHz and 12MHz oscillator requires no external components

OTP Program Memory: 0.5K14

RAM Data Memory: 328

Watchdog Timer function

LIRC oscillator function for watchdog timer

All instructions executed in one or two instruction cycles

Table read instructions

63 powerful instructions

2-level subroutine nesting

Bit manipulation instruction

Low voltage reset function

Wide range of available package types

Peripheral Features

6 bidirectional I/O lines

3 channel 12-bit ADC

External interrupt input shared with an I/O line

Single 8-bit programmable Timer/Event

Counter with overflow interrupt and prescaler

Buzzer driving pair supported

Package types: 10-pin MSOP