Section 6 Bus Controller (BSC)
Rev. 1.00 Mar. 12, 2008 Page 118 of 1178
REJ09B0403-0100
Table 6.3
Bit Settings and Bus Specifications of Basic Bus Interface
Areas
BRSTRM CS256E
Basic Extended Area
256-Kbyte Extended Area
0
Used as basic extended area
0
1
Basic extended area
ABW, AST,
WMS1, WMS0,
WC1, WC0
ABW256, AST256, WMS10,
WC11, WC10
0
Used as burst ROM interface
1
1
Burst ROM interface
*
ABW, AST, WMS0, WC1, WC0,
BRSTS1, BRSTS0
ABW256, AST256, WMS10,
WC11, WC10
Note:
*
In the burst ROM interface, the bus width is specified by the ABW bit in WSCR, the
number of full access states (wait can be inserted) is specified by the AST bit in WSCR,
and the number of access cycles in burst access is specified regardless of the AST bit
setting.
Table 6.4
Bus Specifications for Basic Extended Area/Basic Bus Interface
Bus Specifications
ABW AST
WMS1 WMS0 WC1 WC0 Bus
Width
Number of
Access
States
Number of
Program
Wait
States
0 X X X X 16
2
0
0 1 X X
3
0
0 0
0
1 1
0 2
0
1
Other than
WMS1 = 0 and
WMS0 = 1
1
1
16
3
3
0 X X X X 8
2
0
0 1 X X
3
0
0 0
0
1 1
0 2
1
1
Other than
WMS1 = 0 and
WMS0 = 1
1
1
8
3
3
[Legend]
X: Don't
care
Содержание H8S Family
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Страница 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Страница 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
Страница 476: ...Section 12 Watchdog Timer WDT Rev 1 00 Mar 12 2008 Page 428 of 1178 REJ09B0403 0100...
Страница 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Страница 588: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 1 00 Mar 12 2008 Page 540 of 1178 REJ09B0403 0100...
Страница 632: ...Section 17 Synchronous Serial Communication Unit SSU Rev 1 00 Mar 12 2008 Page 584 of 1178 REJ09B0403 0100...
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Страница 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
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Страница 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
Страница 1066: ...Section 25 Flash Memory Rev 1 00 Mar 12 2008 Page 1018 of 1178 REJ09B0403 0100...
Страница 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
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