SH7618 Datasheet, PDF (174/646 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series

Section 7 Bus State Controller (BSC)
Tables 7.6 to 7.9 show the relationship between endian, device data width, and access unit.
Table 7.6 16-Bit External Device/Big Endian Access and Data Alignment
Data Bus
Strobe Signals
Operation
WE3(BE3), WE2(BE2), WE1(BE1), WE0(BE0),
D31 to D24 D23 to D16 D15 to D8 D7 to D0 DQMUU DQMUL DQMLU DQMLL
Byte access at 0


Data



Assert 
7 to 0
Byte access at 1



Data



Assert
7 to 0
Byte access at 2


Data



Assert 
7 to 0
Byte access at 3



Data



Assert
7 to 0
Word access at 0


Data
Data


Assert Assert
15 to 8 7 to 0
Word access at 2


Data
Data


Assert Assert
15 to 8 15 to 8
Longword 1st time 

Data
Data


Assert Assert
access at 0 at 0
31 to 24 23 to 16
2nd time 

Data
Data


Assert Assert
at 2
15 to 8 7 to 0
Rev. 6.00 Jun. 12, 2007 Page 142 of 610
REJ09B0131-0600