AN985B/BX
Functional Descriptions
7.8.1
Power States
DO (Fully On)
In this state the AN985B/BX operates at full functionality and consumes its normal power. While in the D0 state,
if the CARDBUS clock is lower than 16 MHz, the AN985B/BX may not receive or transmit frames properly.
D1
In this state the AN985B/BX doesn’t response to any accesses, except if configuration space and full function
contexts are in place. The only network operation the AN985B/BX can initiate is a wake-up event.
D2
In this state the AN985B/BX only responds to access configuration space and full function context in place. The
AN985B/BX can’t transmit or receive, even the wake-up frame.
D3cold (Power Removed)
In this state all function context is lost. When power is restored, the function will return to D0.
D3hot (Software Visible D3)
When the AN985B/BX is brought back to D0 from D3hot the software must perform a full initialization.
The AN985B/BX in the D3hot state responds to configuration cycles as long as power and clocks are supplied. This
requires the device to perform an internal reset and return to a power-up reset condition without the RST# pin
asserted.
Table 5
Power State
Device
State
CARDBU Function Context
S-Bus
State
Clock
Power
Supported
Actions to
Function
Supported
Actions from
Function
D0
D1
B0
Full function context in
place
Full speed
Full power
Any CARDBUS Any
transaction
CARDBUS
transaction or
interrupt
B0, B1
Configuration
Stopped to
Full speed
–
CARDBUS
configuration
access
Only wake-up
events
maintained. No Tx and
Rx except wake-up
events
D2
B0, B1,
B2
Configuration
maintained. No Tx and
Rx
Configuration lost, full
initialization required
upon return to D0
All configurations lost.
Power-on defaults in
place on return to D0
Stopped to
Full speed
–
CARDBUS
–
–
–
configuration
access (B0, B1)
D3hot
D3cold
B0, B1,
B2
Stopped to
Full speed
–
CARDBUS
configuration
access (B0, B1)
B3
No clock
No power
Power-on reset
Data Sheet
32
Rev. 1.51, 2005-11-30
INFINEON [ Infineon ]
