89LPC901FN

P89LPC901/902/903 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM Rev. 05 — 17 December 2004 Product data 1. General description The P89LPC901/902/903 are single-chip microcontrollers in low-cost 8-pin packages, 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 P89LPC901/902/903 in order to reduce component count, board space, and system cost. 2. Features 2.1 Principal features s 1 kB byte-erasable Flash code memory organized into 256-byte sectors and 16-byte pages. Single-byte erasing allows any byte(s) to be used as non-volatile data storage. s 128-byte RAM data memory. s Two 16-bit counter/timers. (P89LPC901 Timer 0 may be configured to toggle a port output upon timer overflow or to become a PWM output.) s 23-bit system timer that can also be used as a Real-Time clock. s Two analog comparators (P89LPC902 and P89LPC903, single analog comparator on P89LPC901). s Enhanced UART with fractional baudrate generator, break detect, framing error detection, automatic address detection and versatile interrupt capabilities (P89LPC903). s High-accuracy internal RC oscillator option allows operation without external oscillator components. The RC oscillator (factory calibrated to ±1 %) option is selectable and fine tunable. s 2.4 V to 3.6 V VDD operating range with 5 V tolerant I/O pins (may be pulled...