Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 263 of 906
REJ09B0292-0200
Bit 0—Synchronous DRAM Burst Write Specification (BWE): Enables burst write mode to be
specified when synchronous DRAM is specified for CS2 or CS3 space.
Bit 0: BWE
Description
0
Single write mode
(Initial value)
1
Burst write mode
7.2.4
Wait Control Register 1 (WCR1)
Bit:
15
14
13
12
11
10
9
8
IW31
IW30
IW21
IW20
IW11
IW10
IW01
IW00
Initial value:
1
0
1
0
1
0
1
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
W31
W30
W21
W20
W11
W10
W01
W00
Initial value:
1
1
1
1
1
1
1
1
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Do not access a space other than CS0 until the settings for register initialization are completed.
Bits 15 to 8—Idles between Cycles for Areas 3 to 0 (IW31–IW00): These bits specify idle cycles
inserted between consecutive accesses to different CS spaces. Idles are used to prevent data
conflict between ROM or the like, which is slow to turn the read buffer off, and fast memories and
I/O interfaces. Even when access is to the same space, idle cycles must be inserted when a read
access is followed immediately by a write access. The idle cycles to be inserted comply with the
specification for the previously accessed space
.
The set values below show the minimum number
of idle cycles; more cycles than indicated by the Idles between Cycles setting may actually be
inserted.
IW31, IW21, IW11, IW01
IW30, IW20, IW10, IW00
Description
0
0
No idle cycle
1
One idle cycle inserted
1
0
Two idle cycles inserted
(
Initial value)
1
Four idle cycles inserted
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 ...