R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 213
R5F61525
Manufacturer Part Number
R5F61525
Description
32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5F61525.pdf
(846 pages)
- Current page: 213 of 846
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Figure 7.29 shows a flowchart of the XY conversion.
(3)
When setting the negative value in DOFR, the offset value must be 2's complement. The 2's
complement is obtained by the following formula.
Example:
= H'FFFE0000 + H'00000001
= H'FFFE0001
The value of 2's complement can be obtained by the NEG.L instruction.
2's complement of offset = 1 + ~offset (~: bit inversion)
Figure 7.20 XY Conversion Flowchart Using Offset Addition in Repeat Transfer Mode
Offset Subtraction
Enable repeat escape interrupt
Set address and transfer count
Decrements transfer count
and repeat size
2's complement of H'0001FFFF
Receives transfer request
Set repeat transfer mode
: User operation
Transfer count = 0?
Set DTE bit to 1
Transfers data
Start
End
Yes
No
: DMAC operation
Initializes transfer source address
Set transfer source address + 4
Generates repeat size end
Repeat size = 0?
interrupt request
Rev. 3.00 Mar. 14, 2006 Page 175 of 804
Section 7 DMA Controller (DMAC)
Yes
(Longword transfer)
No
REJ09B0104-0300
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