HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 350

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 300 of 982
REJ09B0023-0400
Bit
10
9
8
7
6
5 to 2
Bit Name
WR3
WR2
WR1
WR0
WN

Initial
Value
1
0
1
0
0
All 0
R/W
R/W
R/W
R/W
R/W
R/W
R
Description
Number of Access Wait Cycles
Specify the number of cycles that are necessary for
read/write access.
0000: No 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: Reserved (Setting prohibited)
1110: Reserved (Setting prohibited)
1111: Reserved (Setting prohibited)
External Wait Mask Specification
Specifies whether or not the external wait input is valid.
The specification of this bit is valid even when the
number of access wait cycles is 0.
0: The external wait input is valid.
1: The external wait input is ignored.
Reserved
These bits are always read as 0. The write value
should always be 0.