UPD78F9234MC-5A4-A Datasheet, PDF (165/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 10 A/D CONVERTER
10.1 Functions of A/D Converter
The A/D converter converts an analog input signal into a digital value, and consists of up to four channels (ANI0 to
ANI3) with a resolution of 10 bits.
The A/D converter has the following function.
• 10-bit resolution A/D conversion
10-bit resolution A/D conversion is carried out repeatedly for one channel selected from analog inputs ANI0 to
ANI3. Each time an A/D conversion operation ends, an interrupt request (INTAD) is generated.
Figure 10-1 shows the timing of sampling and A/D conversion, and Table 10-1 shows the sampling time and A/D
conversion time.
Figure 10-1. Timing of A/D Converter Sampling and A/D Conversion
ADCS ← 1 or ADS rewrite
ADCS
Sampling
timing
INTAD
Note Sampling
time
Conversion time
Note 2 or 3 clocks are required from the ADCS rising to sampling start.
Sampling
time
Conversion time
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