HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 366

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9
Rev. 3.00 Jan. 18, 2008 Page 304 of 1458
REJ09B0033-0300
Bit
12
11
10
9
8
7
6
Bit Name
SW1
SW0
WR3
WR2
WR1
WR0
WM
Bus State Controller (BSC)
Initial
Value
0
0
1
0
1
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Number of Delay Cycles from Address, CSn Assertion to
RD, WEn (BEn) Assertion-
Specify the number of delay cycles from address and CSn
assertion to RD and WEn (BEn) assertion.
00: 0.5 cycle
01: 1.5 cycles
10: 2.5 cycles
11: 3.5 cycles
Number of Access Wait Cycles
Specify the number of wait cycles that are necessary for
read or 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: 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 by this bit is valid even when the number
of access wait cycles is 0.
0: External wait is valid
1: External wait is ignored