參數(shù)資料
型號(hào)： FW82439TX
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù)： 65/102頁
文件大?。?/td> 759K
代理商： FW82439TX
Extended Temperature 82439TX (MTXC) Datasheet
65
PRELIMINARY
operate properly above 1 Mbytes. However once this is done, then SMI handlers execute at full processor
performance.
An error status bit is set in the Extended SMRAM Control register if the CPU tries to access the extended
SMRAM space while SMIACT# is negated and D_OPEN bit is 0. This access is forwarded to PCI bus and
may result in a Master Abort condition.
Extended SMRAM feature allows up to 1 Mbyte of SMRAM space to be writeback cacheable. This memory
space consists of any DRAM not used by the system (as shadow space etc.) between 640 Kbytes and
1 Mbyte (this memory space is referred to as High Memory in this document), and an optional block of
memory referred to as the “TSEG”. The TSEG is either a 128 Kbyte, 256 Kbyte, 512 Kbytes, or 1 Mbytes
block of memory, as defined by TSEG_SZ[1:0] of the SMRAMC register. When TSEG is enabled, the TSEG
block of memory is disabled from the top of memory and the system BIOS should report a main memory size
of (memorize - TSEG) to the OS.
The two areas of memory available for SMRAM when Extended SMRAM is enabled are:
Physical Address
DRAM Address
100A0000h to 100FFFFFh
000A0000h to 000FFFFFh
(High Mem)
10000000h plus TOM minus TSEG_SZ
to
10000000h plus TOM
TOM minus TSEG_SZ to TOM
(TSEG)
Extended SMRAM option has the following DRAM memory available to it:
Table 19. Extended SMRAM DRAM memory regions
DRAM Area
Size/Availability
A Segment
64 Kbytes always available if enabled (i.e., H_SMRAM=1 and G_SMRAME=1)
B Segment
64 Kbytes always available if enabled (i.e., H_SMRAM=1 and G_SMRAME=1)
C Segment
64 Kbytes available if not used for shadowing (as defined by PAM register) and
enabled (i.e., H_SMRAM=1 and G_SMRAME=1)
D Segment
64 Kbytes available if not used for shadowing (as defined by PAM register) and
enabled (i.e., H_SMRAM=1 and G_SMRAME=1)
E Segment
64 Kbytes available if not used for shadowing (as defined by PAM register) and
enabled (i.e., H_SMRAM=1 and G_SMRAME=1)
F Segment
64 Kbytes only available for suspend/resume (as defined by PAM register) if
enabled (i.e., H_SMRAM=1 and G_SMRAME=1)
TSEG
128K, 256K, 512K or 1M bytes available if enabled (i.e., TSEG_EN=1 and
G_SMRAME=1)
相關(guān)PDF資料
PDF描述
FW82815 Controller Miscellaneous - Datasheet Reference
FWA-25A10F Fuse
FWA-30A10F Fuse
FWA-35A21F Fuse
FWA-40A21F Fuse
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