ZuLu
Joined: 13 Sep 2013
Posts: 3
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| time delay between power up and main function. |
 Posted: Tue Sep 17, 2013 5:44 am |
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Hello my friends,
I have PIC18F8723 micro controller in my circuit, this MCU controls inhibit of main power supply. When MCU power supply is stand up, I could not control any ports earlier than 63msec. Minimum time delay of controlling a port in main function is 63msec as shown. In scope screen yellow signal is pin of MCU, green signal is MCU power supply.
How can i control any ports just after power up?I want to shorten this delay as soon as possible.
Fuses: | Code: | #FUSES NOWDT //No Watch Dog Timer
//#FUSES HS //Low power osc < 200 khz
#FUSES INTRC_IO //Internal Oscillator enabled LEBC
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT
//!#FUSES BROWNOUT //brownout reset enabled LEBC
//!#FUSES BORV42 // 4.2'de reset olacak
#FUSES NOPUT //Power Up Timer enabled
#FUSES NOCPD //No EE protection
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOWRT //Program memory not write protected
#FUSES NOCPB //No Boot Block code protection
#FUSES MCLR //Master Clear pin enabled |
Main function summary:
| Code: | void main()
{
set_tris_E(0x00);
output_E(0x80);
...
} |
Thanks. |
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