Location Of Register Information In Address Space - Hitachi H8S/2646 Hardware Manual

8.3.4

Location of Register Information in Address Space

Figure 8-5 shows how the register information should be located in the address space.
Locate the MRA, SAR, MRB, DAR, CRA, and CRB registers, in that order, from the start address
of the register information (contents of the vector address). In the case of chain transfer, register
information should be located in consecutive areas.
Locate the register information in the on-chip RAM (addresses: H'FFEBC0 to H'FFEFBF).
Register
information
start address
Chain
transfer
Figure 8-5 Location of Register Information in Address Space
Lower address
0 1
MRA SAR
DAR
MRB
CRA
MRA SAR
MRB DAR
CRA
4 bytes
2 3
Register information
CRB
Register information
for 2nd transfer in
chain transfer
CRB
199