Renesas H8/38024 Series, Руководство по оборудованию

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Rev. 6.00, 08/04, page 398 of 628
Start
Set A/D conversion speed
and input channel
Enable A/D conversion
end interrupt
Start A/D conversion
A/D conversion
end interrupt?
Yes
No
End
Yes
No
Clear bit IRRAD to
0 in IRR2
Read ADRRH/ADRRL data
Perform A/D
conversion?
Figure 12.5 Flow Chart of Procedure for Using A/D Converter (Interrupts Used)
12.6 A/D Conversion Accuracy Definitions
This LSI's A/D conversion accuracy definitions are given below.
•
Resolution
The number of A/D converter digital output codes
•
Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 12.6).
•
Offset error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from the minimum voltage value 0000000000 to 0000000001
(see figure 12.7).
•
Full-scale error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from 1111111110 to 1111111111 (see figure 12.7).