Fujitsu MB91150 Series, Hardware Manual, Page: 381 / 512

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CHAPTER 17 DMA CONTROLLER
17.3.1 DMAC parameter descriptor pointer (DPDP)
This pointer stores the start address in the descriptor table for the DMAC in RAM.
Bits 0 to 6 are always set to 0. The start address of the descriptor can be set in units of
128 bytes.
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DMAC parameter descriptor pointer (DPDP)
The register configuration of the DMAC parameter descriptor pointer (DPDP) is given below.
• Upon reset, the pointer is not initialized.
• The pointer value can be read and written.
• Use a 32-bit transfer instruction to access this register.
The descriptor used to specify the operating mode for each channel is placed at an address set
by the DPDP, as covered in Table 17.3-1 "Descriptor address for each channel".
31 7 6 0
00000200
H
0000000
Initial value: 0000000
B
Initial value: Undefined
Table 17.3-1 Descriptor address for each channel
DMA channel Descriptor address DMA channel Descriptor address
0 DPDP + 0 (00
H
) 4 DPDP + 48 (30
H
)
1 DPDP + 12 (0C
H
) 5 DPDP + 60 (3C
H
)
2 DPDP + 24 (18
H
) 6 DPDP + 72 (48
H
)
3 DPDP + 36 (24
H
) 7 DPDP + 84 (54
H
)