I want to design a router circuit based on LS1046ARDB-PB, but without CPLD.
To do this, I need to LS1046ARDB-PB.understand the function of CPLD in the
Regarding the CPLD function related to SFP+, I have some question as below.
1. Due to the I2C address confliction, I2C Lines are disconnected from STF connector.
Below is the Errata regarding this issue.
"E-00002 When SFP+ module is inserted, its I2C address conflicts with that of SPD Cut SFP cage’s I2C traces Rev. B Rev. B"
=> Does this mean that SFP+ in LS1046ARDB-PB can works without I2C control of connector side SFT+ module?
2. In the CPLD circuit of LS1046ARDB-PB, STF+ related signals below are connected to CPLD.
Input : XFI1_TX_FAULT,XFI1_RX_VALID,XFI1_MOD_DEF from the STF connector.
XFI1_RETIMER_LOS from the retimer.
Output: XFI1_TX_DISABLE to the STF connector.
But, in the CPLD source cord, I cannot find any function or relation among these signals.
What does CPLD do with above signals?