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Maps and Registers
ATCA-7365-CE Installation and Use (6806800L73N
)
202
Write protection status signals for the Boot SPI flashes are determined by external switch
settings SW1.1and SW1.2. Software can overwrite the status of the write protection status by
writing a magic word to the Boot SPI Flash Write Enable Registers.
6.4.14 BIOS Boot Mode Register
The following table provides details about BIOS Boot Mode Register.
1. The default is latched from SW1.1 when ICH_PLTRST_ is deasserted.
2. The default is latched from SW1.2 when ICH_PLTRST_ is deasserted
Table 6-65 Default Boot SPI Flash Write Enable
Address Offset: 0x41
Bit
Description
Default
Access
7:0
Default Boot SPI Flash Write enable/disable.
A write value 0xC3 enables the Boot Block. All other
values disable the Boot Block.
-
LPC: w
Table 6-66 Recovery Boot SPI Flash Write Enable
Address Offset: 0x42
Bit
Description
Default
Access
7:0
Recovery Boot SPI Flash enable/disable.
A write value 0xC3 enables the Flash. All other values
disable the Flash.
-
LPC: w
Table 6-67 BIOS Boot Mode Register
Address Offset: 0x43
Bit
Description
Default
Access
0
The switch signals SW_BIOS[1:0] controls the BIOS
Boot Mode:
Ext.
1: SW4.3 ON
0: SW4.3 OFF
Содержание ATCA-7365-CE
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