HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 380
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 9
Note:
Rev. 3.00 Jan. 18, 2008 Page 318 of 1458
REJ09B0033-0300
Bit
2
1
0
*
Bus State Controller (BSC)
If both areas 2 and 3 are specified as SDRAM, TRP1/0, TRCD0/1, TRWL1/0, and
TRC1/0 bit settings are common.
If only one area is connected to the SDRAM, specify area 3. In this case, specify area 2
as normal space or byte-selection SRAM.
Bit Name
TRC1
TRC0
0
0
Initial
Value
0
R/W
R
R/W
R/W
Description
Reserved
This bit is always read as 0. The write value should always
be 0.
Number of Cycles from REF Command/Self-Refresh
Release to ACTV Command
Specify the number of minimum cycles from issuing the
REF command or releasing self-refresh to issuing the
ACTV command. The setting for areas 2 and 3 is
common.
00: 3 cycles
01: 4 cycles
10: 6 cycles
11: 9 cycles
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