Section 12 Bus State Controller (BSC)
Bit
Bit Name
19
MPXMD
18
17
BW1
16
BW0
Rev. 4.00 Sep. 14, 2005 Page 310 of 982
REJ09B0023-0400
Initial
Value
R/W
Description
0
R/W
Burst MPX-IO Interface Mode Specification
Specify the access mode in 16-byte access
0: One 4-burst access by 16-byte transfer
1: Two 2-bursts accesses by quad word (8-byte)
Transfer size when MPXMD = 0
D31 D30
0
0
0
0
1
1
1
Transfer size when MPXMD = 1
D31 D30
0
0
0
0
1
0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
0
R/W
Number of Burst Wait Cycles
1
R/W
Specify the number of wait cycles to be inserted at the
2nd and the subsequent access cycles in burst access
00: No cycle
01: 1 cycle
10: 2 cycles
11: 3 cycles
transfer
D29
: Transfer Size
0
0
: Byte (1 byte)
0
1
: Word (2 byte)
1
0
: Longword (4 bytes)
1
1
: Reserved (quad word) (8 bytes)
0
0
: 16 bytes
0
1
: Reserved (32 bytes)
1
0
: Reserved (64 bytes)
D29
: Transfer Size
0
0
: Byte (1 byte)
0
1
: Word (2 byte)
1
0
: Longword (4 bytes)
1
1
: Quad word (8 bytes)
0
0
: Reserved (32 bytes)