HD6473887 Datasheet, PDF (359/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Start
Set A/D conversion speed
and input channels
Enable A/D conversion
end interrupt
Start A/D conversion
A/D conversion
end interrupt?
No
Yes
Clear bit IRRAD to
0 in IRR2
Read ADRRH/ADRRL data
Yes
Perform A/D
conversion?
No
End
Figure 12-5 Flow Chart of Procedure for Using A/D Converter (Interrupts Used)
12.6 Application Notes
• Data in ADRRH and ADRRL should be read only when the A/D start flag (ADSF) in the A/D
start register (ADSR) is cleared to 0.
• Changing the digital input signal at an adjacent pin during A/D conversion may adversely
affect conversion accuracy.
• When A/D conversion is started after clearing module standby mode, wait for 10 ø clock
cycles before starting.
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