HD6432646 Hitachi, HD6432646 Datasheet - Page 233

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HD6432646

Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet

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8.3.4
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
Location of Register Information in Address Space
Figure 8-5 Location of Register Information in Address Space
MRA
MRB
MRA
MRB
0
CRA
CRA
Lower address
1
4 bytes
DAR
SAR
DAR
SAR
2
CRB
CRB
3
Register information
Register information
for 2nd transfer in
chain transfer
199

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