Section 11 Local Bus State Controller (LBSC)
Rev.1.00 Dec. 13, 2005 Page 373 of 1286
REJ09B0158-0100
Bits PCWA/B1 and PCWA/B0 can be used to set the number of wait cycles to be inserted in a
low-speed bus cycle as 0, 15, 30, or 50. This value is added to the number of inserted wait cycles
specified by IW bit in CSnWCR or PCIW bit in CSnPCR. Bit TEDA/B (with a setting range from
0 to 15) can be used to ensure the setup times of the address,
CE1A
(
CS5
),
CE1B
(
CS6
),
CE2A
,
CE2B
and
REG
to the
RD
and
WE1
signals. Bits TEHA/B (with a setting range from 0 to15) can
be used to ensure the hold times of the address,
CE1A
(
CS5
),
CE1B
(
CS6
),
CE2A
,
CE2B
, and
REG
to the
RD
and
WE1
signals.
Bits IWW, IWRWD, IWRWS, IWRRD, and IWRRS in the CS5 bus control register (CS5BCR) or
CS6 bus control register (CS6BCR) are used to set the number of idle cycles between cycles. The
selected number of wait cycles between cycles depends only on the area to be accessed (area 5 or
6). When area 5 is accessed, bits IWW, IWRWD, IWRWS, IWRRD, and IWRRS in CS5BCR are
selected, and when area 6 is accessed, bits IWW, IWRWD, IWRWS, IWRRD, and IWRRS in
CS6BCR are selected.
In 32-byte transfer, a total of 32 bytes are transferred continuously according to the set bus width.
The first access is performed on the data for which there was an access request, and the remaining
accesses are performed in wraparound method according to the set bus width. The bus is not
released during this transfer.
ATA complement mode is to access the ATA device register connected to this LSI. The Device
Control Register, Alternate Status Register, Data Register, and Data Port can be accessed in ATA
complement mode.
To access the Device Control Register and Alternate Status Register, use a CPU byte access (do
not use a DMA transfer), and to access the Data Register, use the CPU word access (do not use a
DMA transfer). When a CPU byte access is executed,
CE1x
is negated and
CE2x
is asserted (x =
A, B). When a CPU word access is executed,
CE1x
is asserted and
CE2x
is negated.
To access the Data Port use a DMA transfer. The setting example of the DMAC is external
request, burst mode, level detection, overrun 0,
DACK
output to the correspondent PCMCIA
connected area. When DMA transfer of an ATA complement mode area is executed, neither
CE1x
nor
CE2x
is asserted. Set the DACKBST bit in BCR of the corresponding DMA transfer
channel to 1, so that the corresponding
DACK
signal is asserted from the beginning to the end of
the DMA transfer cycle.
Specify the number of wait cycles between accesses as 0 for the
DACK
assertion area when
setting the DMA transfer size to 16-byte. After the DMA burst transfer that DACKBST was
enabled has finished, set the DACKBST bit to 1 again before starting the next DMA burst transfer.
Содержание SH7780 Series
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Страница 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Страница 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
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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