Artesyn ATCA-9405 Installation and Use (May 2014) - Manual (Page 103)

Service Infrastructure
ATCA-9405 Installation and Use (6806800M71G) 103
The application running on the SP is responsible for the power cycle. The two Packet Processor
(PP) units are connected to the SP through PCIe interface, thus the power-down and power-on
sequence is handled like a Hot Plug event for standard PCIe plug-in card, insertion and removal
process.
Hot Plug is supported for PCIe Port 1 (PP 1) and PCIe Port 4 (PP 2). The implementation is
compliant with PCI Hot-Plug Specification [14] and Standard Hot-Plug Controller and Subsystem
Specification [15].
6.3.1 Serial Hot Plug Controller
The PEX8608 supports insertion and removal for all downstream ports through an I2C based
Serial Hot Plug Controller (SHPC) and an external I/O Expander per port. The SHPC is able to
control the ports of the I/O Expander through I2C master interface and retrieve the port status,
such as device connect status, power fault, or MRL sensor position.
The application running on the SP is responsible for interaction with the SHPC and the
additional logic in the Power CPLD and Glue Logic FPGA. The two I/O Expander are
implemented in the Glue Logic FPGA.
Figure 6-1 PEX8608 Serial Hot Plug Controller