Operation In Scan Mode - NEC V850E/IA1 mPD703116 User Manual

13.6.2 Operation in scan mode

Pins from the conversion start analog input pin through the conversion termination analog input pin specified in the
ADSCM00 or ADSCM10 register are sequentially selected and A/D converted. An A/D conversion result is stored in
the ADCR0n or ADCR1n register corresponding to the analog input (n = 0 to 7). When conversion terminates for all
analog inputs through the conversion termination analog input pin, an A/D conversion termination interrupt (INTAD0,
INTAD1) is generated, which terminates A/D conversion (ADCS0 or ADCS1 bit of ADSCM0 or ADSCM1 register = 0).
Analog Input A/D Conversion Result Register
Note 1
ANIx ADCRx
| |
Note 2
ANIx ADCRx
Notes 1. Set using SANI3 to SANI0 bits of ADSCM00 or ADSCM10 register.
Be sure to set a pin number that is smaller than the conversion termination analog input pin number
set according to Note 2.
2. Set using ANIS3 to ANIS0 bits of ADSCM00 or ADSCM10 register.
Remark x = 00 to 07, 10 to 17
To restart A/D conversion, write 1 in the ADCE0 or ADCE1 bit of the ADSCM00 or ADSCM10 register. This is
optimal for an application that regularly monitors multiple analog inputs.
Figure 13-7. Example of Scan Mode (A/D Trigger Scan) Operation (ANI02 to ANI05): For A/D Converter 0
ADSCM00
(1) ADCE0 bit of ADSCM00 = 1 (Enabled)
(2) A/D conversion of ANI02
(3) Store conversion result in ADCR02
(4) A/D conversion of ANI03
(5) Store conversion result in ADCR03
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CHAPTER 13 A/D CONVERTER
ANI00
ANI01
ANI02
ANI03
A/D converter 0
ANI04
ANI05
ANI06
ANI07
(6) A/D conversion of ANI04
(7) Store conversion result in ADCR04
(8) A/D conversion of ANI05
(9) Store conversion result in ADCR05
(10) Generate INTAD0 interrupt
User's Manual U14492EJ3V0UD
ADCR00
ADCR01
ADCR02
ADCR03
ADCR04
ADCR05
ADCR06
ADCR07