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MCU provides large memory space

Posted: 06 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:holtek semiconductor? a/d? mcu? ht46r232?

Holtek Semiconductor expanded its A/D series of microcontrollers (MCUs) with the release of the HT46R232 device. This new product 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.

According to the company, the MCU's 40 I/O pins 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. 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, explained Holtek.

Serial communication for the HT46R232 is provided through an internal I?C 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. Furthermore, 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.

The 8-bit HT46R232 MCU is available in both 48 SSOP and 28 SKDIP/SOP packages.

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