Mixed Signal PICtail? Demo Board User’s Guide
;
;
;
;
;
;
;
;
;
7
8
9
A
B
C
D
*
#
852
852
852
697
770
852
941
941
941
1209
1336
1477
1633
1633
1633
1633
1209
1477
if ((_32_steps) & (Fosc_8000000)) | ((_16_steps) & (Fosc_4000000))
;
;*************************************************************************
;
; Delay Calculation for Frequency Generation
; Fosc = 8MHz #steps = 32
; OR
; Fosc = 4MHz #steps = 16
;
; X = Fosc / ( 4 * #steps * Ftone)
;
;
F_Low_table
addwf PCL,F
;X Actual Desired %Error
retlw .66 ;947.0 941 .63%
retlw .90 ;694.4 697 .37%
retlw .90 ;694.4 697 .37%
retlw .90 ;694.4 697 .37%
retlw .81 ;771.6 770 .21%
retlw .81 ;771.6 770 .21%
retlw .81 ;771.6 770 .21%
retlw .73 ;856.2 852 .49%
retlw .73 ;856.2 852 .49%
retlw .73 ;856.2 852 .49%
retlw .90 ;694.4 697 .37%
retlw .81 ;771.6 770 .21%
retlw .73 ;856.2 852 .49%
retlw .66 ;947.0 941 .63%
retlw .66 ;947.0 941 .63%
retlw .66 ;947.0 941 .63%
F_High_table
addwf PCL,F
;X Actual Desired
retlw .47 ;1329.8 1336
retlw .52 ;1201.9 1209
retlw .47 ;1329.8 1336
retlw .42 ;1488.1 1477
retlw .52 ;1201.9 1209
retlw .47 ;1329.8 1336
retlw .42 ;1488.1 1477
retlw .52 ;1201.9 1209
retlw .47 ;1329.8 1336
retlw .42 ;1488.1 1477
retlw .38 ;1644.7 1633
retlw .38 ;1644.7 1633
retlw .38 ;1644.7 1633
retlw .38 ;1644.7 1633
retlw .52 ;1201.9 1209
DS51523A-page 34
%Error
.47%
.59%
.47%
.75%
.59%
.47%
.75%
.59%
.47%
.75%
.72%
.72%
.72%
.72%
.59%
? 2004 Microchip Technology Inc.
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