Circuit Board Reference Manual

Memory Map/Register Definitions
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor 24-7
24.3.3.3 Current Pointer (CP)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R Task Base Address
W
Reset Uninitialized
1514131211109876543210
R Task Base Address
W
Reset Uninitialized
Reg
Addr
MBAR + 0x8000
Figure 24-3. Task Base Address Register (TaskBAR)
Table 24-2. TaskBAR Field Descriptions
Bits Name Description
31–0 Task Base Address Task base address. Pointer to the base address of the DMA task table.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R Descriptor Pointer
W
Reset Uninitialized
1514131211109876543210
R Descriptor Pointer
W
Reset Uninitialized
Reg
Addr
MBAR + 0x8004
Figure 24-4. Current Pointer Register (CP)
Table 24-3. CP Field Descriptions
Bits Name Description
31–0 Descriptor
Pointer
Descriptor pointer. Pointer to the address of the DMA descriptor that is currently executing.