Rev. 2.00, 09/03, page 162 of 690
1.
Normal Space, Byte-Selection SRAM, Address/Data Multiplex I/O (MPX)
CS0WCR, CS6AWCR, CS6BWCR
Bit
Bit Name
Initial
Value
R/W
Description
31 to 13
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
12
11
SW1
SW0
0
0
R/W
R/W
Number of Delay Cycles from Address,
CSn
Assertion to
RD
,
WEn
Assertion
Specify the number of delay cycles from address and
CSn
assertion to
RD
and
WEn
assertion.
00: 0.5 cycles
01: 1.5 cycles
10: 2.5 cycles
11: 3.5 cycles
10
9
8
7
WR3
WR2
WR1
WR0
1
0
1
0
R/W
R/W
R/W
R/W
Number of Access Wait Cycles
Specify the number of cycles that are necessary for read/write
access.
0000: 0 cycle
0001: 1 cycle
0010: 2 cycles
0011: 3 cycles
0100: 4 cycles
0101: 5 cycles
0110: 6 cycles
0111: 8 cycles
1000: 10 cycles
1001: 12 cycles
1010: 14 cycles
1011: 18 cycles
1100: 24 cycles
1101: Setting prohibited
1110: Setting prohibited
1111: Setting prohibited
Содержание SH7705
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