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Chapter 7
DMA Functions (DMA Controller)
Preliminary User’s Manual U15839EE1V0UM00
7.2.11 DMA trigger factor register 3 (DTFR3)
This 8-bit registers is used to control the DMA transfer start trigger of DMA channel 3 through interrupt
requests from on-chip peripheral I/O. The interrupt requests set with these registers serve as DMA
transfer start factors.
This register can be read/written in 8-bit/1-bit units.
Figure 7-13:
DMA Trigger Factor Registers 3 (DTFR3)
Note: DRQ and DOFL are set by hardware and reset by software. Setting these bits by software is not
possible. A “0” must be written to the respective bit location to reset DRQ or DOFL.
Cautions: 1. Be sure to stop DMA operation before making changes to DTFR3 register set-
tings.
2. An interrupt request input in a standby mode (IDLE or software STOP mode) can-
not be used as a DMA transfer start factor.
7
6
5
4
3
2
1
0
Address
Initial
value
DTFR3
DRQ
DOFL
0
0
0
IFC2
IFC1
IFC0
FFFFF846H
00H
Bit Position
Bit Name
Function
7
DRQ
Note
6
DOFL
Note
3 to 0
IFC3 to
IFC0
Sets the interrupt source that serves as the DMA start factor.
IFC2
IFC1
IFC0
Interrupt Source
Peripheral Source
0
0
0
INTIN1
CSI0
0
0
1
INTIN2
CSI1
0
1
0
INTIN3
CSI2
0
1
1
INTIN5
UART0,
Transmission
1
0
0
INTIN7
UART1,
Transmission
1
0
1
INTIN8
ADC
1
1
0
INTIN15
TMG0.4
1
1
1
INTIN16
TMC1
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