16f877 to 18f4620

ferrarilib · Joined: 11 Jun 2005 Posts: 38

hallo and merry christmas for every one !
i am canging pic from 877 to 18f4620
now my questions is in my board ther is osc 8Mhz and now i want use 4620
i must cange to 10mhz ?
thanks everyone

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

You can use an 8 MHz crystal or external oscillator with the 18F4620.

ferrarilib · Joined: 11 Jun 2005 Posts: 38

thanks very much !
now i have a problem with glcd !

i have cange a 877 to 4620 with KS0108 driver .
but show same caracter but dont refresh when cange ando is not complete draw ...
i have try cange delay time in write routine but dont cange .

tre pin connector is :
Chip Select 1 is connected to B1 ////
Chip Select 2 is connected to B0 ////
VSS is connected to GND ////
VDD is connected to +5V ////
V0 - LCD operating voltage (Constrast adjustment) ////
R/S - Register select is connected to B2 ///
R/W - Read or Write is connected to B3 ////
Enable is connected to B4 ////
Data Bus 0 to 7 is connected to port D ////
Reset is connected to B5 ////

with 877 was good !