Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 265 of 906
REJ09B0292-0200
7.2.5
Wait Control Register 2 (WCR2)
Bit:
15
14
13
12
11
10
9
8
A4WD1 A4WD0
—
A4WM
A3WM
A2WM
A1WM
A0WM
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
Bit:
7
6
5
4
3
2
1
0
—
—
—
—
IW41
IW40
W41
W40
Initial value:
0
0
0
0
1
0
1
1
R/W:
R
R
R
R
R/W
R/W
R/W
R/W
Bits 15 and 14—Number of External Waits Specification for Area 4 (A4WD1, A4WD0): These
bits specify the number of cycles between acceptance of CS4 space external wait negation and
RD
or
WEn
negation.
Bit 15: A4WD1
Bit 14: A4WD0
Description
0
0
1 cycle
(Initial value)
1
2 cycles
1
0
4 cycles
1
Reserved (do not set)
Bit 13—Reserved bit. This bit is always read as 0. The write value should always be 0.
Bits 12 to 8—External Wait Mask Specification for Areas 0 to 4 (A4WM–A0WM): These bits
enable waits to be masked for CS spaces 0 to 4. When a value other than 00 is set in the wait
control bits for CS spaces 0 to 4 (W41–W00), external wait input can be enabled, but the wait
input can be masked by setting these bits to 1. With synchronous DRAM, external wait input is
ignored regardless of the settings.
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 ...