Freescale Semiconductor MPC8313E PowerQUICC II Pro Family Reference Manual page 642

PCI Bus Interface
13.4.7 CompactPCI Hot Swap Specification Support
CompactPCI is an open specification supported by the PCI Industrial Computer Manufacturers Group
(PICMG) and is intended for embedded applications using PCI. CompactPCI Hot Swap is an extension of
the CompactPCI specification and allows the insertion and extraction (or "hot swapping") of boards
without adversely affecting system operation. The hot swap specification defines the following levels of
support:
• Hot swap capable
• Hot swap friendly
• Hot swap ready
The PCI controller is hot swap friendly, meaning that it supports the hardware and software connection
processes as defined in the hot swap specification. This level of support allows the board and system
designers to build full Hot Swap and high availability systems based on the PCI controller as a PCI target
device. For details on the hot swap process, refer to the Hot Swap Specification PICMG 2.1, R1.0, August
3, 1998.
13.5 Initialization/Application Information
The following sections describe initialization sequences for host and agent modes.
13.5.1 Initialization Sequence for Host Mode
The following sequences must be followed in host mode:
1. Enable PCI output clocks and select desired frequency ratios. See
Host Mode."
2. Wait for at least 1 ms to enable stable clocks into agent devices
3. Deactivate PCI_RESET_OUT signal for PCI. See
PCI_RESET_OUT signal.
4. Wait for at least 1 ms to enable devices to complete the powerup sequence.
5. Configure PCI internal registers and PCI agents to desired modes of operation
13.5.2 Initialization Sequence for Agent Mode
The following sequences must be followed in agent mode:
1. Optionally initialize subsystem vendor ID/device ID
a) Initialize PCI inbound window size in PIWAR[1:3] desired window size
b) Unlock configuration lock in PCI function configuration register
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
13-60
Section 4.4.1, "Clocking in PCI
Table 13-3 for more information on
Freescale Semiconductor