SH7616 Datasheet, PDF (307/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Section 7 Bus State Controller (BSC)
16 bits, the SH7616 connects D15–D8 to the least significant byte of the other bus master and D7–
D0 to the most significant byte.
Only data conversion is supported by this function. For this reason, be careful not to place
program code or constants in the CS2, CS4 space. When this function is used, make sure that the
access unit is the same for writing and reading. For example, data written by longword access
should be read by longword access. If the read access unit is different from the write access unit,
an incorrect value will be read.
32-bit external device (little-endian)
A24–A0 ^D31
000000 7
000001
000002
000003
000000 7
000002
000000 7
D23
0
7
0 15
0 15
D15
0
7
8
7
8 23
D7
0
7
0 15
16 31
D0 _{Data input/output pin}
Byte read/write of address 0
Byte read/write of address 1
Byte read/write of address 2
0 Byte read/write of address 3
Word read/write of address 0
8 Word read/write of address 2
24 Longword read/write of address 0
Figure 7.8 32-Bit External Devices and Their Access Units
16-bit external device (little-endian)
A24–A0 ^D15
000000 7
000001
000002 7
000003
000000 7
000002 7
000000 7
000002 23
D7
0
7
0
7
0 15
0 15
0 15
16 31
D0 _{Data input/output pin}
Byte read/write of address 0
0 Byte read/write of address 1
Byte read/write of address 2
0 Byte read/write of address 3
8 Word read/write of address 0
8 Word read/write of address 2
8
24 Longword read/write of address 0
Figure 7.9 16-Bit External Devices and Their Access Units
Rev. 2.00 Mar 09, 2006 page 281 of 906
REJ09B0292-0200