Microchip simplifies low-power LCD design
A family of low-power microcontrollers (MCUs) from Microchip feature Core Independent Peripherals (CIPs) and intelligent analogue to drive liquid crystal displays (LCDs).
The PIC16F19197 family is made up of nine devices, including a battery-friendly LCD drive charge pump, 12-bit analogue to digital converter with computation (ADC2), a low-power comparator and active clock-tuning of its high-frequency oscillator. According to Microchip, the PIC16F19197 family are the first eight-bit MCUs to be optimised for low-power and battery-powered touch-enabled LCD applications.
The PIC16F19197 family consists of 28- to 64-pin devices with up to 56kbyte flash and 4.0kbyte random access memory (RAM). The charge pump ensures that LCD screens maintain consistent contrast, even as battery-voltage drops. The ADC2 automates signal acquisition and processing tasks, making robust touch buttons and sliders easy to implement, says Microchip. The active clock-tuning provides a stable oscillator across the entire voltage and temperature operating range. This is achieved in hardware rather than relying upon software, points out Microchip.
There is also a real-time clock and calendar (RTCC) with battery back-up and high-current I/O pins to directly drive the LCD backlighting. The idle/doze low-power modes and peripheral module disable (PMD) serve to extend battery life, while the ability to drive up to 360 LCD segments, make the PIC16F19197 family suitable for battery-powered LCD applications.
The family is supported by the MPLAB Code Configurator (MCC), a free plug-in for MPLAB X and MPLAB Xpress integrated development environments (IDEs). It provides a graphical interface for the configuration of peripherals and functions specific to each application. The Microchip LCD XLP Explorer development board (DM240314) is available today and supports evaluation of the PIC16F19197 family of MCUs.
The first three members of the family are available for volume production and sampling and are offered in a variety of package options.