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IV ANALOG BLOCK: A/D CONVERTER
B-IV-2-14 EPSON S1C33L03 FUNCTION PART
The interrupt factor flag is set to "1" whenever interrupt generation conditions are met, regardless of how the
interrupt enable and interrupt priority registers are set.
If the next interrupt is to be accepted after an interrupt has occurred, it is necessary that the interrupt factor flag be
reset, and that the PSR be set again (by setting the IE bit to "1" after setting the IL to a value lower than the level
indicated by the interrupt priority register, or by executing the reti instruction).
The interrupt factor flag can be reset only by writing to it in the software. Note that if the PSR is set again to accept
interrupts generated (or if the reti instruction is executed) without resetting the interrupt factor flag, the same
interrupt occurs again. Note also that the value to be written to reset the flag is "1" when the reset-only method
(RSTONLY = "1") is used, and "0" when the read/write method (RSTONLY = "0") is used.
At initial reset, the content of FADE becomes indeterminate, so be sure to reset it in the software.
RADE:
A/D converter IDMA request (D2) / Serial I/F Ch.1, A/D, port input 4–7 IDMA request register (0x40293)
Specifies whether to invoke IDMA when an interrupt factor occurs.
When using the set-only method (default)
Write "1": IDMA request
Write "0": Not changed
Read: Valid
When using the read/write method
Write "1": IDMA request
Write "0": Interrupt request
Read: Valid
When RADE is set to "1", IDMA is invoked when an interrupt factor occurs, thereby performing a programmed
data transfer. If RADE is set to "0", normal interrupt processing is performed, without invoking IDMA.
For details on IDMA, refer to "IDMA (Intelligent DMA)".
At initial reset, RADE is set to "0" (interrupt request).
DEADE:
A/D converter IDMA enable (D2) / Serial I/F Ch.1, A/D, port input 4–7 IDMA enable register (0x40297)
Enables IDMA transfer by means of an interrupt factor.
When using the set-only method (default)
Write "1": IDMA enabled
Write "0": Not changed
Read: Valid
When using the read/write method
Write "1": IDMA enabled
Write "0": IDMA disabled
Read: Valid
If DEADE is set to "1", the IDMA request by the interrupt factor is enabled. If this bit is set to "0", the IDMA
request is disabled.
After an initial reset, DEADE is set to "0" (IDMA disabled).