HP A2Y15AV Manual Do Utilizador

16

Datasheet, Volume 2

Not all devices are enabled in all configurations.

S

RO (w/ -V)

Sticky: These bits are only re-initialized to their Reset Value by a 

"Power Good Reset".  

Does not apply to RO (constant) bits.

RW

RW1C

RW1S

-K

RW

Key: These bits control the ability to write other bits (identified 

with a 'Lock' modifier)

-L

RW

Lock: Hardware can make these bits "Read Only" using a separate 

configuration bit or other logic.  

Mutually exclusive with 'Once' modifier.

WO

-O

RW

Once: After reset, these bits can only be written by software once, 

after which they become "Read Only".  

Mutually exclusive with 'Lock' modifier and does not make 

sense with 'Variant' modifier.

WO

-FW

RO

Firmware Write: The value of these bits can be updated by 

firmware (PCU, TAP, and so on).

-V

RO

Variant: The value of these bits can be updated by hardware.  

RW1C and RC bits are variant by definition and therefore 

do not need to be modified.

DRAM Controller

0154h 

0

0

PCI Express* Controller

0151h

1

0

PCI Express Controller

0155h

1

1

PCI Express Controller

0159h

1

2

Integrated Graphics Device

0156h  

2

0

PCI Express Controller

015Dh

6

0