Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 268 of 906
REJ09B0292-0200
Bits 7 to 0—Area 3 to 0
CSn
Assert Period Extension (A3SHW1–A0SHW0): These bits specify
the number of cycles from address/
CSn
output to
RD
/
WEn
assertion and from
RD
/
WEn
negation
to address/
CSn
hold for areas 3 to 0.
A3SHW1
A2SHW1
A1SHW1
A0SHW1
A3SHW0
A2SHW0
A1SHW0
A0SHW0
Description
0
0
0.5 cycle,
CSn
*
hold cycle = 0 cycles
(Initial value)
1
1.5 cycle,
CSn
*
hold cycle = 1 cycle
1
0
2.5 cycle,
CSn
*
hold cycle = 2 cycles
1
Reserved (do not set)
Note:
*
n = 0 to 3
7.2.7
Individual Memory Control Register (MCR)
Bit:
15
14
13
12
11
10
9
8
TRP0
RCD0
TRWL0 TRAS1
TRAS0
BE
RASD
TRWL1
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
7
6
5
4
3
2
1
0
AMX2
SZ
AMX1
AMX0
RFSH
RMODE
TRP1
RCD1
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The TRP1–TRP0, RCD1–RCD0, TRWL1–TRWL0, TRAS1–TRAS0, BE, RASD, AMX2–AMX0
and SZ bits are initialized after a power-on reset. Do not write to them thereafter. When writing to
them, write the same values as they are initialized to. Do not access CS2 or CS3 until register
initialization is completed.
Bits 1 and 15—
RAS
Precharge Time (TRP1, TRP0): When DRAM is connected, specifies the
minimum number of cycles after
RAS
is negated before the next assert. When synchronous
DRAM is connected, specifies the minimum number of cycles after precharge until a bank active
command is output. See section 7.5, Synchronous DRAM Interface, for details.
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...