Section 11 Local Bus State Controller (LBSC)
Rev.1.00 Dec. 13, 2005 Page 358 of 1286
REJ09B0158-0100
In the case where the SRAM interface is set, the
RD
signal, which can be used as
OE
, and write
control signals
WE0
to
WE3
are asserted.
For the number of bus cycles, 0 to 25 wait cycles inserted by CS1WCR can be selected.
When the burst ROM interface is used, a burst pitch number in the range of 0 to 7 is selectable
with bits BW2 to BW0 in CS1BCR.
Any number of wait cycles can be inserted in each bus cycle through the external wait pin (
RDY
).
(When the insert number is 0, the
RDY
signal is ignored.)
The setup time and hold time (cycle number) of the address and
CS1
signals to the read and write
strobe signals can be set within a range of 0 to 7 cycles by CS1WCR. The
BS
hold cycles can be
set within a range of 0 to 1 when the number for the read and write strobe setup wait is 1 or more.
(3) Area
2
For area 2, physical address bits 28 to 26 are 010.
The interfaces that can be set for this area are the SRAM, burst ROM, MPX and DDR-SDRAM
interfaces.
When the SRAM interface is used, a bus width of 8, 16, or 32 bits is selectable with bits SZ in
CS2BCR. When the MPX interface is used, a bus width of 32 bits should be selected through bits
SZ in CS2BCR.
When area 2 is accessed, the
CS2
signal is asserted (except for DDR-SDRAM area).
In the case where the SRAM interface is set, the
RD
signal, which can be used as
OE
, and write
control signals
WE0
to
WE3
are asserted.
For the number of bus cycles, 0 to 25 wait cycles inserted by CS2WCR can be selected.
Any number of wait cycles can be inserted in each bus cycle through the external wait pin (
RDY
).
(When the insert number is 0, the
RDY
signal is ignored.)
The setup time and hold time (cycle number) of the address and
CS2
signals to the read and write
strobe signals can be set within a range of 0 to 7 cycles by CS2WCR. The
BS
hold cycles can be
set within a range of 0 to 1 when the number for the read and write strobe setup wait is 1 or more.
When using area 2 for the DDR-SDRAM interface, set the AREASEL bit in MMSELR. Then the
CS2
signal is not asserted. When the DDR-SDRAM is used, see section 12, DDR-SDRAM
Interface (DDRIF).
Содержание SH7780 Series
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Страница 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Страница 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Страница 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Страница 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Страница 1004: ...Section 24 Multimedia Card Interface MMCIF Rev 1 00 Dec 13 2005 Page 954 of 1286 REJ09B0158 0100 ...
Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Страница 1070: ...Section 26 Serial Sound Interface SSI Module Rev 1 00 Dec 13 2005 Page 1020 of 1286 REJ09B0158 0100 ...
Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Страница 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Страница 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Страница 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
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