HT85F2270 datasheet(16/226 Pages) HOLTEK

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Rev. 1.00

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Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

2 General Description

The HT85F22x0 series of devices are Flash Memory A/D type high performance 1-T architecture

8051-Based microcontrollers. Offering users the convenience of Flash Memory multi-programming

features, these devices also include a wide range of functions and features.

Analog features include a multi-channel 12-bit A/D converter, a 12-bit D/A converter and dual

comparator functions. Multiple timers provide timing, capture, event counter and programmable

clock output functions. Communication with the outside world is catered for by including fully

integrated SPI, I2C and UART interface functions, popular interfaces which provide designers

with a means of easy communication with external peripheral hardware. Protective features such

as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector and Missing Clock

Detector coupled with excellent noise immunity and ESD protection ensure that reliable operation

is maintained in hostile electrical environments.

A full choice of both internal and external high and low speed oscillators are provided with the

internal oscillators requiring no external components for its implementation. A fully internal Phase

Locked Loop and 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 minimize power consumption.

The inclusion of flexible I/O programming features, Time-Base functions along with many other

features ensure that the device will find excellent use in applications such as electronic metering,

environmental monitoring, handheld instruments, household appliances, electronically controlled

tools, motor driving in addition to many others.

The HT85F22x0 series are Flash devices offering the advantages of easy and effective in-circuit

program updates. In addition, an EV chip, HT85V2280, includes an OCDS (On-Chip Debug

Support) interface for the In-Circuit Emulator.

HT85F2270 датащи(PDF) 16 Page - Holtek Semiconductor Inc