Intel 21555 - Manual (Page 74)

74 21555 Non-Transparent PCI-to-PCI Bridge User Manual
Initialization Requirements
The 21555 enters the Signal Insertion state from the Serial Preload state when the following conditions are
satisfied:
• Serial preload is complete.
• Primary Lockout Reset Value bit cleared.
• Ejector handle is closed (micro-switch opens, and l_stat is sampled low).
The card has now been completely seated and the local initialization is complete. The card is ready for host
configuration and initialization. The 21555 sets the INS_STAT bit and asserts p_enum_l to the host. Upon
detecting p_enum_l asserted the host processor initializes the card. When the initialization is complete, the host
clears the INS_STAT bit.