
336
Chapter 26 DMA Controller
2.DMA Controller (DMAC) Registers
If the bit is set while DMA transfer start is disabled (when DMAE of DMACR=0, or DENB of DMACA=0), the
setting takes effect when start is enabled.
If the bit is set while DMA transfer is temporarily stopped (DMAH[3:0] of DMACR not equal to 0000
B
or PAUS of
DMACA=1), the setting takes effect when temporary stopping is canceled.
2.1 Control/Status Registers A (DMACA0 to 4)
Control/status registers A (DMACA0 to 4) control the operation of the DMAC channels. There is
a separate register for each channel.
This section describes the configuration and functions of control/status registers A (DMACA0 to
4).
■
Bit Configuration of Control/Status Registers A (DMACA0 to 4)
Figure 2-2
"Bit Configuration of Control/Status Registers A (DMACA0 to 4)" shows the bit configuration of control/
status registers A (DMACA0 to 4).
Figure 2-2 Bit Configuration of Control/Status Registers A (DMACA0 to 4)
■
Detailed Bit of Control/Status Registers A (DMACA0 to 4)
The following describes the functions of the bits of control/status registers A (DMACA0 to 4).
[Bit 31] DENB (Dma ENaBle): DMA operation enable bit
This bit, which corresponds to a transfer channel, is used to enable and disable DMA transfer.
The activated channel starts DMA transfer when a transfer request is generated and accepted.
All transfer requests that are generated for a deactivated channel are disabled.
When the transfer on an activated channel reaches the specified count, this bit is set to 0 and transfer stops.
The transfer can be forced to stop by writing 0 to this bit. Be sure to stop a transfer forcibly (0 write) only after
temporarily stopping DMA using the PUAS bit (Bit30 of DMACA). If the transfer is forced to stop without first
temporarily stopping DMA, DMA stops but the transferred data cannot be guaranteed. Check whether DMA is
stopped using the DSS[2:0] bits [Bit18-16 of DMACB].
•
If a stop request is accepted during reset: Initialized to 0.
•
This bit is readable and writable.
•
If the operation of all channels is disabled by Bit15 (DMAE bit) of the DMAC all-channel control register
(DMACR), writing 1 to this bit is disabled and the stopped state is maintained. If the operation is disabled by
the above bit while it is enabled by this bit, 0 is written to this bit and the transfer is stopped (forced stop).
DENB
Function
0
Disables operation of DMA on the corresponding channel (initial value).
1
Enables operation of DMA on the corresponding channel.
bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DENB
BLK[3:0]
EIS[3:0]
IS[4:0]
STRG
PAUS
DTC[15:0]
XXXXXXXXXXXXXXXX
B
Address 000200
H
(ch0)
000208
H
(ch1)
000210
H
(ch2)
000218
H
(ch3)
000220
H
(ch4)
Initial value
000000000000XXXX
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 ...
Page 1036: ......
Page 1038: ......