357
Chapter 26 DMA Controller
3.DMA Controller (DMAC) Operation
always be caused.
If a software request occurs together with a start (transfer enable) request, the transfer is started by immediate
output of a DMA transfer request to the bus controller.
3.2 Transfer Sequence
The transfer type and the transfer mode that determine, for example, the operation sequence
after DMA transfer has started can be set independently for each channel (Settings for
TYPE[1:0] and MOD[1:0] of DMACB).
■
Selection of the Transfer Sequence
The following sequence can be selected with a register setting:
•
Burst 2-cycle transfer
•
Demand 2-cycle transfer
•
Block/step 2-cycle transfer
•
Burst fly-by transfer
•
Demand fly-by transfer
•
Block/step fly-by transfer
●
Burst 2-cycle transfer
In a burst 2-cycle transfer, as many transfers as specified by the transfer count are performed continuously for
one transfer source. For a 2-cycle transfer, all 32-bit areas can be specified using a transfer source/transfer
destination address.
A peripheral transfer request, software transfer request, or external pin (DREQ) edge input detection request can
be selected as the transfer source.
The following are some features of a burst transfer:
When one transfer request is received, transfer is performed continuously until the transfer count register reaches
0.
The transfer count is the transfer count x block size (BLK[3:0] of DMACA x DTC[15:0] of DMACA).
Another request occurring during transfer is ignored.
If the reload function of the transfer count register is enabled, the next request is accepted after transfer ends.
If a transfer request for another channel with a higher priority is received during transfer, the channel is switched
at the boundary of the block transfer unit. Processing resumes only after the transfer request for the other
channel is cleared.
Table 3-1 Specifiable transfer addresses (burst 2-cycle transfer)
Transfer source addressing
Direction
Transfer destination addressing
All 32-bit areas specifiable
=>
All 32-bit areas specifiable
Summary of Contents for FR Family FR60 Lite
Page 2: ...FUJITSU LIMITED ...
Page 3: ...FR60 32 BIT MICROCONTROLLER MB91460 Series User s Manual ...
Page 15: ...xi ...
Page 16: ...xii ...
Page 38: ...22 Chapter 2 MB91460 Rev A Rev B Overview 4 Block Diagram ...
Page 128: ...112 Chapter 4 CPU Architecture 9 Addressing ...
Page 153: ...137 Chapter 8 Device State Transition 3 State Transition Diagram ...
Page 154: ...138 Chapter 8 Device State Transition 3 State Transition Diagram ...
Page 169: ...153 Chapter 9 Reset 10 Caution ...
Page 170: ...154 Chapter 9 Reset 10 Caution ...
Page 180: ...164 Chapter 10 Standby 7 Q A ...
Page 182: ...166 Chapter 10 Standby 8 Caution ...
Page 199: ...183 Chapter 12 Instruction Cache 2 Main body structure Figure 2 3 I Cache Address Map ...
Page 200: ...184 Chapter 12 Instruction Cache 2 Main body structure Figure 2 4 I Cacheable Area ...
Page 222: ...206 Chapter 13 Clock Control 8 Caution ...
Page 232: ...216 Chapter 14 PLL Interface 7 Caution ...
Page 236: ...220 Chapter 15 CAN Clock Prescaler 3 Registers ...
Page 288: ...272 Chapter 19 Timebase Timer 8 Caution ...
Page 314: ...298 Chapter 22 Main Oscillation Stabilisation Timer 8 Caution ...
Page 326: ...310 Chapter 23 Sub Oscillation Stabilisation Timer 8 Caution ...
Page 348: ...332 Chapter 25 External Interrupt 8 Caution ...
Page 398: ...382 Chapter 26 DMA Controller 6 DMA External Interface ...
Page 402: ...386 Chapter 27 Delayed Interrupt 8 Caution ...
Page 412: ...396 Chapter 28 Bit Search 8 Caution ...
Page 521: ...505 Chapter 30 I O Ports 3 Port Register Settings ...
Page 522: ...506 Chapter 30 I O Ports 3 Port Register Settings ...
Page 574: ...558 Chapter 31 External Bus 4 Endian and Bus Access Byte Access ...
Page 628: ...612 Chapter 31 External Bus 13 Notes on Using the External Bus Interface ...
Page 706: ...690 Chapter 33 I2C Controller 4 Programming Flow Charts ...
Page 748: ...732 Chapter 34 CAN Controller 4 CAN Application ...
Page 762: ...746 Chapter 35 Free Run Timer 8 Caution ...
Page 790: ...774 Chapter 37 Output Compare 8 Caution ...
Page 838: ...822 Chapter 39 Programmable Pulse Generator 8 Caution ...
Page 850: ...834 Chapter 40 Pulse Frequency Modulator 4 PFM Operation and Setting ...
Page 886: ...870 Chapter 42 Sound Generator 3 Registers ...
Page 900: ...884 Chapter 43 Stepper Motor Controller 4 Caution ...
Page 939: ...923 Chapter 47 LCD Controller 3 Configuration Figure 3 2 Register List ...
Page 943: ...927 Chapter 47 LCD Controller 4 Registers Correspondence between VRAM and Common Segment Pins ...
Page 964: ...948 Chapter 48 Clock Monitor 8 Caution ...
Page 994: ...978 Chapter 51 Low Voltage Reset Interrupt 3 Registers ...
Page 998: ...982 Chapter 52 Regulator Control 3 Registers ...
Page 1008: ...992 Chapter 53 Fixed Mode Reset Vector BOOT ROM 5 Bootloader Update Strategy ...
Page 1024: ...1008 Chapter 54 Flash Memory 8 Caution ...
Page 1032: ...1016 Chapter 55 Flash Security 4 Register ...
Page 1034: ...1018 Chapter 56 Electrical Specification ...
Page 1035: ...FR60 MB91460 Series Hardware Manual European Microcontroller Design Centre Author MBo ...
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