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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 280 of 982
REJ09B0023-0400
Bit Bit
Name
Initial
Value R/W Description
5 DMAIWA
0 R/W
Method
of
inserting
wait states between access cycles
when DMA single address transfer is performed.
Specifies the method of inserting the idle cycles
specified by the DMAIW[2:0] bit. Clearing this bit will
make this LSI insert the idle cycles when another
device, which includes this LSI, drives the data bus
after an external device with
DACK
drove it. However,
when the external device with
DACK
drives the data
bus continuously, idle cycles are not inserted. Setting
this bit will make this LSI insert the idle cycles after an
access to an external device with
DACK
, even when
the continuous accesses to an external device with
DACK
are performed.
0: Idle cycles inserted when another device drives the
data bus after an external device with
DACK
drove
it.
1: Idle cycles always inserted after an access to an
external device with
DACK
4
1
R
Reserved
This bit is always read as 1. The write value should
always be 1.
3
0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
2 CKD2RDV
0 R
CKIO2
Drive
Specifies whether the CKIO2 pin outputs a low level
signal or clock (B
φ
). In clock mode 7 (CKIO pin input),
the CKIO2 pin has high impedance. The CK2DRV bit
setting is enabled in the 2 or 6 clock mode.
0: Outputs a low level signal
1: Outputs a clock (B
φ
)
1 HIZMEM
0 R/W
High-Z
Memory
Control
Specifies the pin state in software standby mode for
A25 to A0,
BS
,
CS
, RD/
WR
,
WEn
/DQNxx,
RD
, and
FRAME
.
0: High impedance in standby mode.
1: Driven in standby mode
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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Page 1036: ...SH7641 Hardware Manual...