Artesyn ATCA-9405 Installation and Use (May 2014) - Manual (Page 104)

Service Infrastructure
ATCA-9405 Installation and Use (6806800M71G) 104
6.4 I2C Slave Interface
PEX8608 includes an I2C slave interface. The interface is a sideband mechanism that allows the
device configuration registers to be programmed, independent of the PCIe upstream link.
The I2C slave interface is connected to second I2C interface of P2020. For more information,
see
I2C Interface on page 85 .
6.5 JTAG Support
The IEEE 1149.1 compliant JTAG boundary scan interface of PEX8608 is connected to the
onboard payload JTAG chain.
6.6 Lane Status
Lane status outputs are provided. Each output is directly connected to a small LED to provide
visual indication regarding the PHY of each lane. LEDs are encoded as listed below:
 LED offLane is disabled
 LED onLane is enabled, 5.0 GT/s
 LED blinkingLane is enabled, 2.5 GT/s
Table 6-2 Lane Mapping
D22 RTM
D23 Ethernet Switch Port Group 3
D24 Ethernet Switch Port Group 1
D25 Packet Processor 1
D26 Ethernet Switch Port Group 4
D27 Ethernet Switch Port Group 2
D28 Packet Processor 1
D29 Service Processor