Panasonic MN101L Series

Chapter 16
A/D Converter (ADC)
Operation XVI - 11
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The A/D conversion time indicated in Table:16.3.2 may shorten up to one cycle time of A/D
conversion cycle depending on phase differences between system clock and A/D conversion
clock.
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 A/D Resistor Ladder Control
The ANCTR0.ANLADE is set to "1" to apply current to the resistor ladder for A/D conversion. When A/D con-
version is stopped, the ANCTR0.ANLADE is set to "0" to save the power consumption.
 A/D Conversion Starting Factor Setup
A/D conversion starting factor is set by the ANCTR2.ANSTSEL1-0.
The ANCTR2.ANSTSEL1-0 are set to select the starting factor of External interrupt 0, Timer 7 interrupt or A/D
conversion interrupt.
In addition, the A/D conversion is started by setting the ANCTR2.ANST to "1".
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When External Interrupt 0 is selected as the A/D conversion starting factor, the valid edge
should be assigned by IRQ0ICR.REDG0.
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The interrupt valid edge need to be assigned before selecting the interrupt 0 factor
for A/D conversion starting factor.
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 A/D Conversion Starting Setup
The start of A/D conversion is set by the ANCTR2.ANST. The A/D conversion is started by setting the
ANCTR2.ANST to "1". When A/D conversion is started by External Interrupt 0 factor, Timer 7 interrupt factor or
A/D conversion interrupt factor, the ANCTR2.ANST is set to "1" automatically after External Interrupt 0 is gen-
erated and the A/D conversion is started. The ANCTR2.ANST is cleared to "0" automatically after the conversion
data is stored.