Operation Of The A/D Converter; Chapter 13 8-Bit D/A Converter - Fujitsu FR60 Hardware Manual

CHAPTER 12 A/D CONVERTER
12.3

Operation of the A/D Converter

The A/D converter uses a 10-bit serial/parallel conversion system and can convert data
in a period as short as 1.48 µs.
The A/D converter provides two conversion modes (single conversion and scan
conversion modes), which can be selected.
■ Single Conversion Mode
The A/D converter enters the single conversion mode when the SCAN bit of the control status register is
set to "0".
In single conversion mode, the A/D converter converts the analog input specified by the ACS2 to ACS0
bits of the control status register, then ends conversion.
Figure 12.3-1 shows the conversion operation in single conversion mode.
Example: Value of ACS bits = 010
The A/D converter converts the analog input on channel AN2 and sets the INT bit when conversion ends.
The interrupt request flag is set at the end of every conversion operation.
376
(specifying channel AN2)
B
Figure 12.3-1 Single Conversion Mode
Example: Value of ACS bits = 010
STAR
INT
Start of A/D conversion
(specifies channel AN2)
B
End of A/D conversion
A/D
conversion
period