Cpld; Figure 2-3 Status And Control Functions - GE NETernity CP921RC–30X Hardware Reference Manual

Compactpci gigabit switch - picmg layers 2 and 3 ipv6 compatible, openware switch management

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2.7 CPLD

A CPLD implements the following:

30 NETernity CP921RC-30X Hardware Reference Manual

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• All logic for the reset function

• CompactPCI hot swap requirements

• Link and Activity status LEDs for the two front panel 10 GbE SFP ports

• Control and status for the 1GbE SFP I/O functions such as SFP_PRSNT,

SFP_TXEN, SFP_RXLOS. As shown in a simple diagram in Figure 2‐3, the

CPLD monitors the SFP_PRSNT signal from each 1GbE SFP. When a 1GbE

SFP is inserted into the socket, the CPLD asserts the SFP_PRSNT signal to

the Processor. The CPLD also asserts the Change‐of‐State interrupt request

(COS_IRQ) and other control and status signals.

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