UPD78F0411GA-GAM-AX Datasheet, PDF (293/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 12 10-BIT SUCCESSIVE APPROXIMATION TYPE A/D CONVERTER (μPD78F041x only)
12.1 Function of 10-Bit Successive Approximation Type A/D Converter
The 10-bit successive approximation type A/D converter converts an analog input signal into a digital value, and
consists of up to 6 channels (ANI0 to ANI5) 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 analog input channel selected from ANI0 to
ANI5. Each time an A/D conversion operation ends, an interrupt request (INTAD) is generated.
ANI0/P20
ANI1/P21
ANI2/P22
ANI3/P23
ANI4/P24
ANI5/P25
Figure 12-1. Block Diagram of 10-Bit Successive Approximation type A/D Converter
Sample & hold circuit
AVSS
ADCS bit
Voltage comparator
Successive
approximation
register (SAR)
AVREF
AVSS
3
3
Controller
A/D conversion result
register (ADCR)
6
ADS2 ADS1 ADS0
ADPC02 ADPC01 ADPC00
ADCS FR3 FR2
Analog input channel
specification register (ADS)
A/D port configuration
register 0 (ADPC0)
Internal bus
FR1 FR0 LV1 LV0 ADCE
A/D converter mode
register (ADM)
INTAD
User’s Manual U18698EJ1V0UD
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