Renesas SH7641 - Manual (Page 344)

Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 294 of 982
REJ09B0023-0400
Bit Bit Name
Initial
Value R/W Description
5 to 2  All 0 R Reserved
These bits are always read as 0. The write value
should always be 0.
1
0
HW1
HW0
0
0
R/W
R/W
Delay Cycles from RD,
WEn Negation to Address,
CSn Negation
Specify the number of delay cycles from RD and
WEn
negation to address and
CSn negation.
00: 0.5 cycles
01: 1.5 cycles
10: 2.5 cycles
11: 3.5 cycles
• CS5BWCR
Bit Bit Name
Initial
Value R/W Description
31 to 22  All 0 R Reserved
These bits are always read as 0. The write value
should always be 0.
21 SZSEI 0 R/W MPX-IO Interface Bus Width Specification
Specifies an address to select the bus width when the
BSZ[1:0] of CS5BBCR are specified as 11. This bit is
valid only when area 5B is specified as MPX-I/O.
0: Selects the bus width by address A14
1: Selects the bus width by address A21
The relationship between the SZSEL bit and bus width
selected by A14 or A21 are summarized below.
SZSEL A14 A21 Bus Width
0 0 Not affected 8 bits
0 0 Not affected 16 bits
1 Not affected 0 8 bits
1 Not affected 1 16 bits