Altera SerialLite II Protocol Manual de usuario descargar pdf (Pagina 32)

32 Altera Corporation

SerialLite II Protocol Reference Manual

Physical Layer Description

If a deviation from consecutive {|TS2|} sequences to consecutive

{|TDS|} sequences is detected, the receiver/transmitter transitions to the

character alignment state.

Once the receiver has simultaneously detected at least four {|TDS|}

sequences on all lanes and the lanes are correctly ordered, the transmitter

sends an additional eight {|TDS|} sequences and the

receiver/transmitter transitions to the acknowledge lane alignment state.

Acknowledge Lane Alignment State

The transmitter sends the ||IDL|| ordered set on all lanes and the receiver

waits to receive the /IDL/ characters all lanes.

Once the receiver has detected at least four ||IDL|| ordered sets and the

transmitter has sent at least eight ||IDL|| ordered sets on all lanes, the

initialization is complete and the receiver/transmitter transitions to the

link-up state.

Link-Up State

The link-up state is the normal operation state. User data is transmitted

and received across the established link. This state is the only one where

link status indicates link-up.

If eight consecutive {|TS1|} sequences are detected by the receiver on any

lane or a link error has been declared, the receiver/transmitter transitions

to the reset state.

Self Synchronizing Link Training State Machine

Figure 2–14 on page 2–33 shows the self-synchronizing training state

machine.

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Altera SerialLite II Protocol Manual de usuario Pagina 32