Motorola CPCI-6115 Manuel de service Page 35

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Chapter 2 System Architecture
CPX8216 and CPX8216T Installation and Use (6806800A52C)
15
Physical Connection Process
The physical connection process is the basic process of putting a board into a live chassis, or
physically removing the board. The process includes two states:
P0 - The board is physically separate from the chassis
P1 - The board is fully seated, but not powered, and not active on the PCI bus. All pins are
connected.
Hardware Connection Process
The hardware connection process involves the electrical connection or disconnection of the
board. This process includes three states:
H0 - The board is not active on the PCI bus. This state is equivalent to P1 above.
H1 - The board has powered up and is sufficiently initialized to connect to the PCI bus.
H2 - The board is powered, and enabled for access by a PCI bus transaction (normally by
the host) in PCI configuration space only. The board configuration space is not yet
initialized.
When a newly inserted board has completed H2, the board is operable from a hardware
perspective. It has run its power up diagnostics, initialized itself, loaded EEPROM data, etc. The
blue LED is off in the H2 state, indicating that the board should not be pulled out.
Software Connection Process
The software connection process includes the tasks needed to configure and load software.
This process contains four states:
S0 - The Software Connection Process has not been initiated. The board’s configuration
space registers are accessible but not yet initialized.
S1 - The board is configured by the system. The system has initialized the board’s PCI
configuration space registers with I/O space, memory space, interrupts, and PCI bus
numbers. The board is ready to be accessed by a device driver but no drivers are loaded
at this time.
S2 - The necessary supporting software (drivers, etc.) have been loaded. The board is
ready for use by the OS and/or the application, but no operations involving the board are
active or pending.
S3 - The board is active. Software operations are either active or pending.
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