參數(shù)資料
型號： FW82439TX
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù)： 68/102頁
文件大小： 759K
代理商： FW82439TX
Extended Temperature 82439TX (MTXC) Datasheet
68
PRELIMINARY
MTXC
RSM Well
DRAM Refresh
Suspend
RASx#, CASx#, WEx#
CKE
SUSCLK, SUSSTAT1#
Core Well
CPU/L2 Interface
PCI Interface
mtxc_05
Figure 9. MTXC Power Planes
4.6.2.1.
Power Transition Changes
The MTXC supports several suspend modes that support the PIIX4 system suspend states. Table 21
illustrates what suspend mode the MTXC enters upon the appropriate PIIX4 suspend mode.
Table 21. Power Transition States
PIIX4 Suspend State
MTXC Suspend State
MTXC Description
POS
PonS
All interfaces enabled, clocks stopped.
STR
PoffS
CPU, L2, PCI interfaces disabled
STD
Off
Chip is off.
Off/Soft Off
Off
Chip is off.
The core logic should be reset when the PCI bus is reset. This means that the refresh logic and power
sequencing logic is not reset during resumes (part of the resume well).
4.6.2.2 MTXC Transition
The MTXC will transition from suspend refresh to normal refresh when it samples SUSCLK active (high) with
the first sample of SUS_STAT# inactive (high). Samples are taken on the rising edge of the PCI clock. The
MTX will reset its resume well (DRAM configuration registers go to default settings) when it samples SUSCLK
inactive (low) with the first sample of SUS_STAT# inactive (high). The mechanism which allows this
functionality is based on the PIIX4 deasserting the SUS_STAT# signal in relation to the SUSCLK,
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