Renesas SH7781 - Manual (Page 426)

11. Local Bus State Controller (LBSC)
Rev.1.00 Jan. 10, 2008 Page 396 of 1658
REJ09B0261-0100
Table 11.14 16-Bit External Device/Little-Endian Access and Data Alignment
Operation Data Bus Strobe Signals
Access
Size Address
No.
D31 to
D24 D23 to
D16 D15 to
D8 D7 to
D0
WE3 WE2 WE1 WE0
2n 1
⎯ ⎯ ⎯ Data
7 to 0
Asserted Byte
2n + 1 1
⎯ ⎯ Data
7 to 0
⎯
Asserted
Word 2n 1
⎯ ⎯ Data
15 to 8
Data
7 to 0 Asserted Asserted
4n 1
⎯ ⎯ Data
15 to 8
Data
7 to 0 Asserted Asserted Longword
4n + 2 2
⎯ ⎯ Data
31 to 24
Data
23 to 16 Asserted Asserted
32 Bytes* 8n 1
⎯ ⎯ Data
15
to 8
Data 7
to 0 Asserted Asserted
8n + 2 2
⎯ ⎯ Data
31
to 24
Data 23
to 16 Asserted Asserted
8n + 4 3
⎯ ⎯ Data
47
to 40
Data 39
to 32 Asserted Asserted
… … … … … … … … … …
8n + 30 16 ⎯ ⎯ Data
255 to
248
Data
247 to
240 Asserted Asserted
Note: * This table shows an example when the access start address is on the 32-byte
boundary. When the start address is not on the 32-byte boundary, accesses are
performed up to immediately before the 32-byte boundary and the address is wrapped
around to the previous 32-byte boundary.