UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 425

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

14.3.3 Scan Mode
result by the CPU into consideration can be performed. In scan mode 1, no delay control is performed but the A/D conversion
interval is fixed.
(1) Scan mode 0 (bit 5 (SCMD) of A/D converter mode register (ADM) = 0)
Two scan modes, 1 and 0, are available. In scan mode 0, delay control that takes delay in reading the A/D conversion
Generally, use of scan mode 1 is recommended.
Input from the analog input pins specified by bits 1 to 3 (ANIS0 to ANIS2) of the ADM is selected and converted in
order.
For example, if ANIS2 to ANIS0 of the ADM = 001, ANI0 and ANI1 will be scanned repeatedly (ANI0
in the A/D conversion result register (ADCR) and an A/D conversion end interrupt request (INTAD) is generated.
(a) TRG bit
(b) TRG bit
ANI1
A/D Conversion
...). In the scan mode, at the end of the conversion operation for each input the conversion value is stored
A/D Conversion
(
(
CS
MS
ANIS2-ANIS0
CS
MS
ANIS2-ANIS0
INTAD
ADCR
INTAD
INTP5
ADCR
0
1
1
1
0
1
Conversion Start
Initialization
Conversion Start
001
010
ANI0
ANI0
Figure 14-7 Scan Mode 0 Operation Timing
(
(
Conversion End Conversion End Conversion End Conversion End Conversion End Conversion End
Conversion End Conversion End
CHAPTER 14 A/D CONVERTER
ANI1
ANI1
ANI0
ANI0
Initialization Initialization
ANI2
ANI0
ANI1
ANI0
ANI1
ANI1
ANI0
ANI0
Conversion End
ANI0
ANI1
ANI1
Initialization
ANI0
ANI1
ANI0
ANI0
Conversion End
ANI1
ANI0
385