New addition to Holtek's A/D MCU range - HT46R232

Jane 1, 2005

After the successful release of the HT46R23 and HT46R24 devices, Holtek is now pleased to announce the release of an additional device in the A/D series of MCUs, namely the HT46R232. By providing the same number of I/O pins and PWM outputs as the HT46R24, while containing the same Program Memory and Data Memory capacity as the HT46R23, a further flexible and function packed device is available to the user.

The HT46R232 device contains 4K of OTP Program Memory and 192 bytes of General Purpose Data Memory, providing the user with a flexible and large application memory space for more complicated applications with larger data requirements. The 40 I/O pins in the device provide the designer with the means to meet the demands of applications with multi input and output control requirements, where it can directly interface to external switches for input control, directly drive LEDs, or control external components such as Triacs, relays etc. The 8-channel 10-bit resolution A/D input can be used to directly measure and convert external analog signals such as those from battery voltage detectors, current sensors, temperature, humidity and pressure sensors. The 4-channel 8-bit high frequency PWM modulator can dynamically read the internal PWM registers and directly control the duty cycle of their corresponding output. These PWM outputs can be connected to suitable external circuitry to control items such as temperature, voltage and current as well as many others.

Serial communication for the HT46R232 is provided through an internal I²C bus interface allowing for convenient and simplified on board application communication. An additional feature is the Programmable Frequency Divider, which can generate extremely accurate frequencies on its external PFD pin, to drive application circuits requiring an accurate frequency source. Directly driving an audio buzzer is a simple application for the PFD. The internal Low Voltage Reset function is used to detect the system voltage, which if it falls below a certain level, will generate a reset signal, preventing any software malfunctions that may occur due to unstable power supply conditions.

As one of Holtek's new generation MCU devices, the new 8-bit HT46R232 microcontroller comes in both 48 SSOP and 28 SKDIP/SOP packages and is an industrial specification device. Suitable for a wide range of both industrial and home appliance applications in areas such as switching power supplies, multi-function battery chargers, household appliances etc, this new device, with its many features and flexibility opens up many new application possibilities.

Complementing Holtek's range of MCU devices is a comprehensive suite of hardware and software tools in the form of the HT-IDE3000 development system. Features such as real time emulation, memory/register modification, hardware execution breakpoints, trace analyzers etc, are all standard features of the system, all of which add together to provide designers with all the tools they need for rapid and efficient product application development and debug.