uPD780065 Subseries PUM - Renesas Electronics

CHAPTER 11 A/D CONVERTER
11.4.3 A/D converter operation mode
One analog input channel is selected from among ANI0 to ANI7 by the analog input channel specification register
(ADS0) and start A/D conversion.
When bit 7 (ADCS0) of the A/D converter mode register (ADM0) is set to 1, A/D conversion of the voltage applied
to the analog input pin specified by the analog input channel specification register (ADS0) starts.
Upon the end of the A/D conversion, the conversion result is stored in the A/D conversion result register (ADCR0),
and the interrupt request signal (INTAD0) is generated. After one A/D conversion operation is started and ended,
the next conversion operation is immediately started. A/D conversion operations are repeated until new data is written
to ADS0.
If ADS0 is rewritten during A/D conversion, the converter suspends A/D conversion and A/D conversion of the
newly selected analog input channel is started.
If data with ADCS0 set to 0 is written to ADM0 during A/D conversion operation, the A/D conversion operation stops
immediately.
A/D conversion
ADCR0
INTAD0
Remarks 1. n = 0, 1, ......, 7
2. m = 0, 1, ......, 7
Figure 11-6. A/D Conversion
ADM0 set
ADCS0 = 1 ADS0 rewrite ADCS0 = 0
ANIn ANIn ANIn ANIm ANIm
Conversion suspended;
Conversion results are not stored
ANIn ANIn ANIm
Preliminary User’s Manual U13420EJ2V0UM00
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