PIC24FJ64GA705 Datasheet, PDF (69/412 Pages) –

PIC24FJ256GA705 FAMILY
REGISTER 5-3: DMAINTn: DMA CHANNEL n INTERRUPT REGISTER
R-0
DBUFWF⁽¹⁾
bit 15
R/W-0
CHSEL6
R/W-0
CHSEL5
R/W-0
CHSEL4
R/W-0
CHSEL3
R/W-0
CHSEL2
R/W-0
CHSEL1
R/W-0
CHSEL0
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
HIGHIF^(1,2) LOWIF^(1,2) DONEIF⁽¹⁾ HALFIF⁽¹⁾ OVRUNIF⁽¹⁾
—
bit 7
U-0
R/W-0
—
HALFEN
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
bit 14-8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-1
bit 0
DBUFWF: DMA Buffered Data Write Flag bit⁽¹⁾
1 = The content of the DMA buffer has not been written to the location specified in DMADSTn or
DMASRCn in Null Write mode
0 = The content of the DMA buffer has been written to the location specified in DMADSTn or DMASRCn
in Null Write mode
CHSEL<6:0>: DMA Channel Trigger Selection bits
See Table 5-1 for a complete list.
HIGHIF: DMA High Address Limit Interrupt Flag bit^(1,2)
1 = The DMA channel has attempted to access an address higher than DMAH or the upper limit of the
data RAM space
0 = The DMA channel has not invoked the high address limit interrupt
LOWIF: DMA Low Address Limit Interrupt Flag bit^(1,2)
1 = The DMA channel has attempted to access the DMA SFR address lower than DMAL, but above
the SFR range (07FFh)
0 = The DMA channel has not invoked the low address limit interrupt
DONEIF: DMA Complete Operation Interrupt Flag bit⁽¹⁾
If CHEN = 1:
1 = The previous DMA session has ended with completion
0 = The current DMA session has not yet completed
If CHEN = 0:
1 = The previous DMA session has ended with completion
0 = The previous DMA session has ended without completion
HALFIF: DMA 50% Watermark Level Interrupt Flag bit⁽¹⁾
1 = DMACNTn has reached the halfway point to 0000h
0 = DMACNTn has not reached the halfway point
OVRUNIF: DMA Channel Overrun Flag bit⁽¹⁾
1 = The DMA channel is triggered while it is still completing the operation based on the previous trigger
0 = The overrun condition has not occurred
Unimplemented: Read as ‘0’
HALFEN: Halfway Completion Watermark bit
1 = Interrupts are invoked when DMACNTn has reached its halfway point and at completion
0 = An interrupt is invoked only at the completion of the transfer
Note 1: Setting these flags in software does not generate an interrupt.
2: Testing for address limit violations (DMASRCn or DMADSTn is either greater than DMAH or less than
DMAL) is NOT done before the actual access.
 2016 Microchip Technology Inc.
DS30010118B-page 69