cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 319
cs5535
Manufacturer Part Number
cs5535
Description
Geode Cs5535 Companion Multi-function South Bridge
Manufacturer
National Semiconductor Corporation
Datasheet
1.CS5535.pdf
(555 pages)
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Revision 0.8
DIVIL Register Descriptions
The enables default to 0. If 0, reads or writes to the indicated device are blocked during activity. This may cause an SSMI
or ERROR if enabled by the associated MSR. Thus, writes are discarded and reads return all Fs. If an enable is 0, a chip
select for the indicated device is not asserted. If an enable is 1, the indicated device is available for access during activity.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31:18
15:4
Bit
17
16
3
2
1
0
Name
RSVD
AC_DMA_W
AC_DMA_R
RSVD
AC_DMA_LPC_
IW
AC_DMA_LPC_IR
AC_DMA_LPC_
MW
AC_DMA_LPC_
MR
RSVD
Description
Reserved. Reads return 0; writes have no effect.
Allow DMA Writes during DMA Activity. If set, this bit allows writes to the DMA con-
troller during DMA activity (data transfers). This mechanism may be used, among other
things, to abort a hung DMA transfer. If clear, DMA controller writes are locked out dur-
ing DMA activity.
Allow DMA Reads during DMA Activity. If set, this bit allows reads from the DMA
controller during DMA activity (data transfers). If clear, DMA controller reads are locked
out during DMA activity.
Reserved. Reads return 0; writes have no effect.
LPC I/O Writes during LPC DMA If set, this bit allows I/O writes to the LPC bus during
LPC DMA transfer. If clear, I/O writes are locked out during LPC DMA transfers.
LPC I/O Reads during LPC DMA. If set, this bit allows I/O reads to the LPC bus during
LPC DMA transfer. If clear, I/O reads are locked out during LPC DMA transfers.
LPC Memory Writes during LPC DMA. If set, this bit allows memory writes to the LPC
bus during LPC DMA transfer. If clear, memory writes are locked out during LPC DMA
transfers.
LPC Memory Reads during LPC DMA. If set, this bit allows memory reads to the LPC
bus during LPC DMA transfer. If clear, memory reads are locked out during LPC DMA
transfers.
(Continued)
DIVIL_AC_DMA Bit Descriptions
DIVIL_AC_DMA Register Map
319
RSVD
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