參數(shù)資料
型號(hào): SII3512ECTU128
元件分類: 總線控制器
英文描述: PCI BUS CONTROLLER, PQFP128
封裝: LEAD FREE, TQFP-128
文件頁數(shù): 60/132頁
文件大?。?/td> 3011K
代理商: SII3512ECTU128
SiI3512 PCI to Serial ATA Controller
Data Sheet
Silicon Image, Inc.
DS-0102-D01
2007-2010 Silicon Image, Inc. All rights reserved.
25
CONFIDENTIAL
Auto-Initialization
The SiI3512 controller supports an external flash and/or EEPROM device for BIOS extensions and user-defined PCI
configuration header data.
Auto-Initialization from Flash
The SiI3512 controller initiates the flash detection and configuration space loading sequence upon the release of
PCI_RST_N. It begins by reading the highest two addresses (0x7FFFF and 0x7FFFE), checking for the correct data
signature pattern — 0xAA and 0x55, respectively. If the data signature pattern is correct, the SiI3512 device continues to
sequence the address downward, reading a total of sixteen bytes. If the Data Signature is correct (0x55 at 0x7FFFC), the
last 12 bytes are loaded into the PCI Configuration Space registers.
Note: If both flash and EEPROM are installed, the PCI Configuration Space registers will be loaded with the EEPROM‘s
data. While the sequence is active, the SiI3512 controller responds to all PCI bus accesses with a Target Retry.
D15
D14
D05
D04
D03
D02
D01
D00
MEM_ADDR
MEM_DATA
MEM_RD_N
MEM_W R_N
MEM_CS_N
PCI_RST_N
t1
t2
7FFFF
7FFFE
7FFFD
7FFFC
7FFFB
7FFFA
7FFF1
7FFF0
Figure 12. Auto-Initialization from Flash Timing
Table 11. Auto-Initialization from Flash Timing
Parameter
Value
Description
t1
660 ns
PCI reset to Flash Auto-Initialization cycle begin
t2
9600 ns
Flash Auto-Initialization cycle time
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