SH7763 Datasheet, PDF (694/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 15 External CPU Interface (EXCPU)
(2) Data Alignment Conversion for the External CPU
For the external CPU, the EXCPU performs data alignment conversion with the same endian as
this LSI. This conversion supports both big endian, where the upper byte is placed at the smaller
address, and little endian, where the lower byte is placed at the smaller address. Endian selection is
done at a power-on reset by means of an external pin.
Table 15.4 Access and Data Alignment for Little Endian
Byte access to address 0
Byte access to address 1
Byte access to address 2
Byte access to address 3
Byte access to address 4
Byte access to address 5
Byte access to address 6
Byte access to address 7
Word access to address 0
Word access to address 2
Word access to address 4
Word access to address 6
Longword access to
address 0
Longword access to
address 4
EX_AD31 to
EX_AD24
EX_AD23 to
EX_AD16
EX_AD15 to
EX_AD8
EX_AD7 to
EX_AD0
Data 7 to data 0
Data 7 to data 0
Data 7 to data 0
Data 7 to data 0
Data 7 to data 0
Data 7 to data 0
Data 7 to data 0
Data 7 to data 0
Data 15 to
data 8
Data 7 to data 0
Data 15 to
data 8
Data 7 to data 0
Data 15 to
data 8
Data 7 to data 0
Data 15 to
data 8
Data 7 to data 0
Data 31 to
data 24
Data 23 to
data 16
Data 15 to
data 8
Data 7 to data 0
Data 31 to
data 24
Data 23 to
data 16
Data 15 to
data 8
Data 7 to data 0
Rev. 1.00 Oct. 01, 2007 Page 628 of 1956
REJ09B0256-0100