Sundance SMT300Q v.1.6 - Manual (Page 17)

User Manual (QCF42); Version 3.0, 8/11/00; © Sundance Multiprocessor Technology Ltd. 1999
6 Shared Memory Resource
The SMT300Q has 1 MB of shared SRAM that can be accessed by both the
CompactPCI host and the Master module. This allows applications to transfer data
between the host PC and the DSP at data rates approaching 100MB/s. The address
of the shared memory is shown in the memory map.
The CompactPCI Bridge DMA processor sees the shared memory at a different
address from that used for normal accesses. For normal memory access the memory
base address register offset is 0x0000 0000. For DMA access address line A28 (On
hardware interface) must be high, therefore DMA memory access starts at 0x4000
0000 (Not 0x1000 0000 as addressing is in bytes).