CHAPTER 12 DMA FUNCTIONS
User’s Manual U13850EJ6V0UD
458
(d) V850/SB1
(
µµµµ
PD703030B, 703030BY, 703032A, 703032AY, 703032B, 703032BY, 70F3030B, 70F3030BY,
70F3032A, 70F3032AY, 70F3032B, 70F3032BY)
V850/SB2
(
µµµµ
PD703036H, 703036HY, 703037A, 703037AY, 703037H, 703037HY, 70F3036H, 70F3036HY,
70F3037A, 70F3037AY, 70F3037H, 70F3037HY)
Set the DRAn register to a value in the range of 0000H to 0FFFH or 1000H to 3FFFH (n = 0 to 5).
Figure 12-5. Correspondence Between DRAn Setting Value and Internal RAM (24 KB)
xxFFFFFFH
xxFF9000H
xxFF8FFFH
xxFFF000H
xxFFEFFFH
xxFF8000H
xxFF7FFFH
Access-prohibited
area
Expansion ROM area
On-chip peripheral
I/O area
Internal RAM area
(DRAn setting value)
(0FFFH)
(1000H)
(0000H)
(3FFFH)
xxFFC000H
xxFFBFFFH
12 KB (usable for DMA)
4 KB (usable for DMA)
xxFFE000H
xxFFDFFFH
Caution
Do not set odd addresses for 16-bit transfer (DCHCn register DSn =1).
Remark
The DRAn register setting values are in parentheses.
Содержание V850/SB1
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