5 - Low Pin Count (LPC) Devices

Abstract

The P8xLPCxxx family of microcontrollers is designed for low pin count (LPC) applications with high functionality and a wide range of performance. There are two types of LPC devices—namely, P87LPC76x with EPROM/OTP code memory ranging from 1 KB to 4 KB, and P89LPC9xx with 4 KB to 8 KB of flash memory. All the LPC range incorporates 12C and UART serial interfaces and a Watchdog (Wd) timer. The P87LPC767, P87LPC768, and P87LPC769 devices all contain analog to digital converter (ADC) circuitry onboard. The P87LPC768 has pulse width modulation (PWM) while the P87LPC769 has digital to analog converter (DAC) circuitry onboard. The P89LPC932 has 8 KB of Flash code memory, 128 bytes of RAM data memory, and special features such as the capture/compare unit (CCU) and serial peripheral interface (SPI). The 87LPC769 is a 20-pin single-chip microcontroller designed for LPC applications. A member of the Philips LPC family, the 87LPC769 offers programmable oscillator configurations for high and low speed crystals or RC operation, wide operating voltage range, programmable port output configurations, selectable Schmitt trigger inputs, LED drive outputs, and a built-in watchdog timer. The P89LPC932 device is based on a high-performance processor architecture that executes instructions in two to four clocks, six times the rate of standard 80C51 devices. Many system level functions have been incorporated into the P89LPC932 to reduce component count, board space, and system cost.