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CHAPTER 11 A/D CONVERTER
The read value by a read-modify-write instruction is 1.
When the INTE bit is 0, this bit is meaningless.
Bit 13: INTE (Interrupt Enable)
This bit enables an interrupt at the end of conversion.
0: Disable interrupt
1: Enable interrupt
Set this bit when activation DMA transfer on interrupt request.
Reset initializes this bit to 0.
Bit 12: PAUS (A/D Converter Pause)
This bit is set when A/D conversion is paused.
If data is converted continuously because there is only one register for storing conversion
results, the previous data will be destroyed without DMA transfer of the conversion results.
To prevent this problem, the next conversion data can be stored only after DMA transfer of
the conversion results. A/D conversion is paused during this transfer.
Once DMA has finished the transfer, A/D conversion starts again.
This bit is valid only when DMA is used.
For details, see 11.5, "Converted Data Protection Function."
Reset initializes this bit to 0.
Bits 11 and 10: STS1, STS0 (Start Source Select)
Reset initializes these bits to 00.
These bits specify an A/D activation resource.
If two or three resources are set, the first resource activates the A/D converter.
Note that the activation resource changes immediately after the bit settings are changed.
Precautions:
For external triggering, the falling edge of an input signal is detected.
The A/D converter may be activated if this bit is rewritten to set external trigger activation
when the external trigger input level is low.
For timer activation, reload timer channel 0 is selected. If these bits are changed to timer
activation when the reload timer output level is high, the A/D converter may be activated.
Bit 9: STRT (Start)
Writing 1 into this bit activates the A/D converter.
For reactivation, write the bit again.
Table 11.3-1 Selection of A/D Converter Activation Resources
STS1
STS0
Function
0
Software activation
0
1
External trigger and software activation
1
0
Internal reload timer and software activation
1
External trigger, timer, and software activation