Texas Instruments SPRU938B manual Vlynq Functional Description, Vlynq Module Structure

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Peripheral Architecture

2.5VLYNQ Functional Description

The VLYNQ core supports both host-to-peripheral and peer-to-peer communication models and is symmetrical. The VLYNQ module structure is shown in Figure 4.

Figure 4. VLYNQ Module Structure

		System￿clock		VLYNQ￿clock
Slave	Address	Outbound	Outbound		8B/10B		Serial
config￿bus			command	TxSM		Serializer
	translation	commands			encoding		TxData
interface			FIFO
		(FIFO3)					Serial
							TxClk
			Return
			data
			FIFO
	Registers	(FIFO2)
			Return
			data
			FIFO
		(FIFO0)					Serial
							RxClk
Master	Address	Inbound	Inbound		8B/10B		Serial
config￿bus			command	RxSM		Deserializer
	translation	commands			decoding		RxData
interface			FIFO
		(FIFO1)

The VLYNQ core module implements two 32-bit configuration bus interfaces. Transmit operations and control register access require the slave configuration bus interface. The master configuration bus interface is required for receive operations. Converting to and from the 32-bit bus to the external serial interface requires serializer and deserializer blocks.

8b/10b block coding encodes data on the serial interface. Frame delineation, initialization, and flow control use special overhead code groups.

FIFOs buffer the entire burst on the bus for maximum performance, thus minimizing bus latency. Using write operations of each VLYNQ module interfaced is typically recommended to ensure the best performance on both directions of the link.

12 VLYNQ Port SPRU938B –September 2007

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