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2.5.1
Write Operations
Address
translation
commands
Outbound
Outbound
command
FIFO
data
Return
FIFO
data
FIFO
Return
command
Inbound
FIFO
Registers
translation
Address
TxSM
8B/10B
encoding
Serializer
commands
Inbound
RxSM
Deserializer
decoding
8B/10B
Serial
TxData
Serial
RxData
System clock
Address
translation
Registers
commands
Inbound
translation
Address
commands
Outbound
8B/10B
decoding
FIFO
FIFO
command
Inbound
data
Return
FIFO
RxSM
Deserializer
RxData
Serial
encoding
8B/10B
VLYNQ Clock
command
Return
data
FIFO
Outbound
TxSM
Serializer
TxData
Serial
Slave
config bus
interface
System clock
VLYNQ clock
Local VLYNQ
Remote VLYNQ
Master
config bus
interface
Master
config bus
interface
Slave
config bus
interface
Peripheral Architecture
Write requests that initiate from the slave configuration bus interface of the local device write to the
outbound command (CMD) FIFO. Data is subsequently read from the FIFO and encapsulated in a write
request packet. The address is translated, and the packet is encoded and serialized before being
transmitted to remote device. The remote device subsequently deserializes and decodes the receive data
and writes it into the inbound CMD FIFO. A write operation initiates on the remote device’s master
configuration bus interface after reading the address and data from the FIFO.
The data flow between two VLYNQs that are connected is shown in
Figure 5
. In the example shown in
Figure 5
, the write originates from the DM644x device.
Figure 5. Write Operations
VLYNQ Port
14
SPRUE36A – September 2007
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