HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 278

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

SDRAM:
• CS3WCR
Rev. 1.00, 02/04, page 240 of 804
Bit
31 to 15
14
13
12
11
10
9
Bit Name

TRP1
TRP0

TRCD1
TRCD0

Initial
Value
All 0
0
0
0
0
1
0
R/W Description
R
R/W
R/W
R
R/W
R/W
R
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.
Number of Cycles from Auto-precharge/PRE Command to
ACTV Command
Specify the number of minimum cycles from the start of auto-
precharge or issuing of PRE command to the issuing of
ACTV command for the same bank.
00: 1 cycle
01: 2 cycles
10: 3 cycles
11: 4 cycles
Reserved
This bit is always read as 0. The write value should always
be 0. If 1 is written to these bits, correct operation cannot be
guaranteed.
Number of Cycles from ACTV Command to
READ(A)/WRIT(A) Command
Specify the number of minimum cycles from issuing ACTV
command to issuing READ(A)/WRIT(A) command.
00: 1 cycle
01: 2 cycles
10: 3 cycles
11: 4 cycles
Reserved
This bit is always read as 0. The write value should always
be 0. If 1 is written to this bit, correct operation cannot be
guaranteed.