Q.Mention the maximum operating frequency of PIC16F877.

The PIC16F887 is one of Microchip's more recent PIC parts and carries all the components a modern microcontroller normally needs. Its low price, wide application range, high quality and easy availability make it well suited to controlling industrial processes, machine-control devices and measurement systems.

Its key specifications are the ones to memorise for the II PUC board exam:

• Architecture: RISC with only 35 instructions, all single-cycle except branches.
• Operating frequency: 0-20 MHz, with a factory-calibrated internal oscillator selectable from 8 MHz down to 31 kHz.
• Power supply: 2.0 V-5.5 V, with a power-saving sleep mode and as little as 50 nA in standby; Brown-Out Reset is provided.
• Program memory: 8 KB of FLASH ROM, reprogrammable up to 100000 times.
• Data memory: 368 bytes of RAM and 256 bytes of EEPROM, the EEPROM writable more than 1000000 times.
• I/O: 35 I/O pins with high current for direct LED drive, software-selectable pull-ups and interrupt-on-change. …