IC programmer function description
First, AT89S51, AT89S52 … and another MCU ISP programmer:
51 The study supports in-system programming of AT89S51 and AT89S52. In this function, only three I/O lines of 51 Study need INT0, T0, T1; the schematic diagram is as follows:
Use the ISP programming cable, one end connects to the ISP programming socket on the emulation header, and the other end is connected to the target circuit board ISP socket.
For the at89s5x microcontroller, the ISP socket is defined from left to right as +5V, P1.5, P1.6, P1.7, RESET, GND.
For the at90s series of microcontrollers, the ISP socket is defined from left to right as +5V, PB5, PB6, PB7, RESET, GND.
The following is a physical map of the ISP programming socket and programming cable: