General Description

These devices provide a combination of a fully featured MCU plus an RF transmitter function, giving

them great flexibility for use in wide range of wireless I/O control applications such as industrial

control, consumer products, subsystem controllers, etc.

Analog features include a multi-channel 12-bit A/D converter. Multiple and extremely flexible

Timer/Event Counters provide full timing functions. Protective features such as an internal Watchdog

Timer and Low Voltage Reset coupled with excellent noise immunity and ESD protection ensure that

reliable operation is maintained in hostile electrical environments. An extensive choice of oscillator

functions are provided including a fully integrated system oscillator which requires no external

components for its implementation. The ability to operate and switch dynamically between a range of

operating modes using different clock sources gives users the ability to optimise microcontroller

operation and minimise power consumption. The devices also include flexible I/O programming

features Time-Base functions and a range of other features.

The RF transmitter is a high performance and easy to use transmitter operating in the 300MHz to

450MHz frequency band. One only needs to add a crystal reference frequency, and a limited number of

external components to create a complete and versatile RF transmitter system. The device is capable of

delivering more than +9dBm into a 50

W load. Such a power level enables a small form factor

transmitter to operate near the maximum limit of the transmission regulations. The device can operate

with ASK - Amplitude Shift Keying, and OOK - On-Off Keying, UHF receiver types from wide-band

super-regenerative radios to narrow-band, high performance super-heterodyne receivers. The data rate

is higher than 10kbps, allowing the device to support more complicated control protocols.

For enhanced power saving, the device includes a data tracking function. The data tracking function

enables the PLL to be activated as long as high transient data input trigger signals are received. The

PLL will also be automatically switched off if there are no data input transients for a time exceeding

approximately 300ms. As there is a reference clock input on line PB0, the MCU can use its internal RC

clock rather than using an additional crystal for the system clock. These features add up to ensure that

the devices can offer excellent capabilities in terms of functionality and power-saving as well as being

highly cost effective in a huge range of remote wireless applications

Selection Guide

Part No.

Program

Memory

Data

Memory

I/O

8-bit

Timer

Time

Base

RF

Transmitter

A/D

PWM

Stack

Package

HT48R01T3

1K

´15

96

´8

92

1

Ö¾

¾

6

16NSOP

HT46R01T3

1K

´15

96

´8

92

1

Ö

12-bit

´4 8-bit´1

6

16NSOP

Rev. 1.30

2

November 23, 2010

HT46R01T3/HT48R01T3

8-Bit OTP MCU with RF Transmitter