STC89C52RC Development Board

SMD STC89C52RC chip

It has 44 pins. The only difference between it and the through-hole 52 chip is that it has an additional P4 port with 4 I/O pins, which is one of its features.

Supports USB power supply + download + serial communication

Only a common USB cable is needed to program and power the chip.

Has 4 more I/O pins than the through-hole STC89C52RC, namely the P4 port

(As many friends who play with single-chip microcomputers know, although there are only 4 more I/O pins, they may play a crucial role in many competitions.)

All pins of the single-chip microcomputer

Except for the reset pin and crystal oscillator pins, all other pins are led out, and their positions are roughly the same as those of the through-hole I/O pins.