SH7080 Datasheet, PDF (326/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 9 Bus State Controller (BSC)
Initial
Bit
Bit Name Value R/W Description
19
MPXMD
0
R/W Burst MPX-I/O Interface Mode Specification
Specifies the access mode for 16-byte access.
0: 4-burst access in 16-byte transfer units
1: 2-burst access in 8-byte transfer units
Transfer Size when MPXMD = 0
D31 D30 D29 Transfer Size
0
0
0
Byte (one byte)
0
0
1
Word (two bytes)
0
1
0
Longword (four bytes)
0
1
1
Reserved
1
0
0
16 bytes
1
0
1
Reserved
1
1
1
Reserved
Transfer Size when MPXMD = 1
D31 D30 D29 Transfer Size
0
0
0
Byte (one byte)
0
0
1
Word (two bytes)
0
1
0
Longword (four bytes)
0
1
1
Quadword (eight bytes)
1
0
0
Reserved
18

0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
Rev. 3.00 May 17, 2007 Page 268 of 1582
REJ09B0181-0300