jw28p50c chip is a single chip microcomputer, its pin functions are as follows:
1. Port P0: eight common I\/O ports
2. Port P1: eight common I\/O ports
3. Port P2: Eight common I\/O ports
4. Port P3: provides eight common I\/O ports
5. RESET: Reset port. The high level is valid for resetting the chip
6. VSS: Ground port
7. VDD: power supply positive port, supply voltage is 4.5V-5.5V, can be used for external crystal oscillator interface
8. XTAL1: crystal oscillator input port
9. XTAL2: crystal oscillator output port
10. PSEN: Chip selection control pin for external ROM access
11. ALE: Address latch enable pin, high level valid, used to latch the address line
12. EA\/VPP: Select external ROM or EEPROM memory or interface programming pins
13. RXD: serial port receiving pin
14. TXD: serial port sending pin
15. INT0: External 0 interrupt pin
16. INT1: External interrupt pin 1
It should be noted that when using the jw28p50c chip, the pin should be used correctly according to the specific application requirements to ensure normal operation.