Andy_123
Member level 4
what is mean by oscillator frequency[at89c51]
Guys,
I mostly dealing with PICs, but now need help with AT89C51.
If this is off-topic here, let me know please.
I have hex file that we normally loading to the AT89C51 using FLIP and it works just fine.
I have no source code, but I have hex image file.
Device uses 11 MHz crystal and getting this value is hard sometimes.
I want to use more common 10, 20 or 12MHz crystals.
I am not sure how critical to have 11MHz, but devices is talking over serial port at fixed baud rate - this definately will be affected by different clock - I must keep baud rate at 19K2. Everything else is done by interrupt.
As I am absolutely new to 89C51:
- what tools do I need to accomodate a different crystal (software)?
- is it possible if I have hex file only, no source code?
- what will be easiest change: clock divider, port baud etc.
Thanks
Guys,
I mostly dealing with PICs, but now need help with AT89C51.
If this is off-topic here, let me know please.
I have hex file that we normally loading to the AT89C51 using FLIP and it works just fine.
I have no source code, but I have hex image file.
Device uses 11 MHz crystal and getting this value is hard sometimes.
I want to use more common 10, 20 or 12MHz crystals.
I am not sure how critical to have 11MHz, but devices is talking over serial port at fixed baud rate - this definately will be affected by different clock - I must keep baud rate at 19K2. Everything else is done by interrupt.
As I am absolutely new to 89C51:
- what tools do I need to accomodate a different crystal (software)?
- is it possible if I have hex file only, no source code?
- what will be easiest change: clock divider, port baud etc.
Thanks