EMK310 Additional notes XC866 timing From XC866 datasheet

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# EMK310 Additional notes XC866 timing From XC866 datasheet - PowerPoint PPT Presentation

EMK310 Additional notes XC866 timing From XC866 datasheet. Timing with internal osc = 10 MHz. Different clock frequencies. Thus…. The internal oscillator runs at f osc = 10 MHz The XC866 system frequency f sys = 80 MHz (refer to page 2 for equation)

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### EMK310Additional notesXC866 timingFrom XC866 datasheet

Thus…
• The internal oscillator runs at fosc = 10 MHz
• The XC866 system frequency fsys = 80 MHz (refer to page 2 for equation)
• Other clock sources derived from fsys usually by dividing by 3.
• Clock relevant for Timers is peripheral clock fPCLK = 26.7 MHz
• Clock relevant for instructions is CPU clock fCCLK = 26.7 MHz
Baud rate calculation for 9600 BAUD
• fPCLK = 26.7 MHz
• PRE = 1
• BAUD rate = 9600
• BG = fPCLK /(baud rate x 16 x PRE) – 1

= 26.7e6 /(9600 x 16 x 1) – 1