HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 274

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Rev. 1.00, 02/04, page 236 of 804
Bit
10
9
8
7
6
5 to 2
1
0
Bit Name
WR3
WR2
WR1
WR0
WM

HW1
HW0
Initial
Value R/W Description
1
0
1
0
0
All 0
0
0
R/W
R/W
R/W
R/W
R/W External Wait Mask Specification
R
R/W
R/W
Number of Access Wait Cycles
Specify the number of cycles that are necessary for read
access.
0000: 0 cycles
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
Specifies whether or not the external wait input is valid. The
specification by this bit is valid even when the number of
access wait cycle is 0.
0: External wait input is valid
1: External wait input is ignored
Reserved
These bits are always read as 0. The write value should
always be 0. If 1 is written to these bits, correct operation
cannot be guaranteed.
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