SMART 6806800K30J, Инструкция по установке и использованию

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44 RTM-ATCA-F125 Installation and Use (6806800K30J)
Functional Description
Functional Description

SFP LOS

SFP+ MOD_ABS

SFP+ TX_FAULT

SFP+ LOS
Each signal can be programmed to cause an interrupt when its state changes.
4.6.3 BCM8747 Control and Status
The RTM FPGA provides register access to the BCM8747 TXONOFF signals which allow
the SFP+ transmitters to be disabled as well as putting the phys into a low-power mode.
The RTM FGPA provides access to the following BCM8747 status signals:

PCMULK

PCDRLK

PLOSB

LASI
Each signal can be programmed to cause an interrupt when its state changes.
4.6.4 SFP I2C Interface
The RTM FPGA provides an I2C master to access the register space on the base channel
SFP modules (the SFP+ modules are accessed through the BCM8747s). A single master
is provided with a multiplexer to select which of the four SFPs the access is directed to.
4.6.5 Reset Handling
The RTM FPGA provides register control of the BCM8747 reset inputs to allow the front-
blade control processor to reset the phys. At system reset, as indicated by the zone 3
RTM_RST# signal, the phys are forced into reset until this is cleared by a register write.
This is to ensure that the phys are in reset until the telecom clock subsystem has been
programmed if necessary to provide the phy reference clocks.
4.6.6 BCM8747 SPI Flash
The SPI ports from both of the BCM8747s connect to the FPGA along with a SPI Flash
device. Register settings allow access to be granted to either BCM8747 and also provide
a programming port.