Why does my program always start from C:0x00AE?

Dear all, Thank you for your help in advance. I created a very simple program to test my Monitor-51 which is showed below: #include "AT89X55.H" sbit P25 = 0xA5; void DELAY(int j) { int i;...
Why does the falling edge external interrupt always triggering?

Hi everyone, i have met another problem that i am unable to solve for several days. The Falling Edge External Interrupt that i have set INT0 of the DS89C450 MCU is always triggering even when i do not...
Why does my program always start from C:0x00AE?

Dear all, Thank you for your help in advance. I created a very simple program to test my Monitor-51 which is showed below: #include "AT89X55.H" sbit P25 = 0xA5; void DELAY(int j) { int i;...
Why does the falling edge external interrupt always triggering?

Hi everyone, i have met another problem that i am unable to solve for several days. The Falling Edge External Interrupt that i have set INT0 of the DS89C450 MCU is always triggering even when i do not...
Why USB_UP_LED is always on

Hi I am using keil's LPC1700 demo board, testing the usb device MSC function, after usbd_init() and usbd_connect(__TRUE), windows display a disk, the USB_UP_LED is on, this is expected, however,...