HT85F2240 datasheet(13/147 Pages) HOLTEK

13 / 147 page

Rev. 1.10

1� of 147

�� 1� �01�

A/D Flash 8051 Core Low Pin Count MCU

HT85F2230/HT85F2240

2 General Description

The HT85F2230 and HT85F2240 are A/D Flash type low pin count 1-T architecture 8051 based

microcontrollers. These devices are designed for general use, however in having an internal A/D

converter, they can directly interface to analog signals, such as those from sensors. Offering users

the convenience of Flash Memory multi-programming features, these devices also include a wide

range of functions and features.

The device’s main features include a multi-channel 12-bit A/D Converter and multiple timers which

provide timing, capture, event counting and programmable clock output functions. Protective

features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector and

excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile

electrical environments.

A full choice of external and internal low and high speed oscillator functions are provided with

the internal oscillators requiring no external components for their 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 inclusion of flexible I/O programming features and Time-Base function along with many

other features ensure that the devices will find excellent use in applications such as sensor signal

processing, motor driving, industrial control, consumer products and subsystem controllers in

addition to many others.

As these MCUs are Flash memory type devices, they offer offer the advantages of easy and

effective in-circuit program updates. In addition, an EV chip, in the form of the HT85V2240

device, with its OCDS (On-Chip Debug Support) interface, is supplied for full in-circuit emulation

purposes.

HT85F2240 датащи(PDF) 13 Page - Holtek Semiconductor Inc