Renesas SH7781 - Manual (Page 425)

11. Local Bus State Controller (LBSC)
Rev.1.00 Jan. 10, 2008 Page 395 of 1658
REJ09B0261-0100
Table 11.13 32-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
4n 1
⎯ ⎯ ⎯ Data
7 to 0
Asserted
4n + 1 1
⎯ ⎯ Data
7 to 0
⎯
Asserted
4n + 2 1
⎯ Data
7 to 0
⎯ ⎯ Asserted
Byte
4n + 3 1 Data
7 to 0
⎯ ⎯ ⎯ Asserted
4n 1
⎯ ⎯ Data
15 to 8
Data
7 to 0 Asserted Asserted Word
4n + 2 1 Data
15 to 8 Data
7 to 0
⎯ ⎯ Asserted Asserted
Longword 4n 1 Data
31 to 24
Data
23 to 16 Data
15 to 8 Data
7 to 0 Asserted Asserted Asserted Asserted
32 Bytes* 8n 1 Data 31
to 24
Data 23
to 16 Data 15
to 8 Data 7
to 0 Asserted Asserted Asserted Asserted
8n + 4 2 Data 63
to 56 Data 55
to 48 Data 47
to 40 Data 39
to 32 Asserted Asserted Asserted Asserted
8n + 8 3 Data 95
to 88 Data 87
to 80 Data 79
to 72 Data 71
to 64 Asserted Asserted Asserted Asserted
… … … … … … … … … …
8n + 28 8 Data
255 to
248 Data
247 to
240 Data
239 to
232 Data
231 to
224 Asserted Asserted 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.