Datasheet

Figure 48-9. Control Packet Rx Device Protocol
Init
State = Idle
Receive Command
Receive
Data
Send RxStatus = ReceiverReady
yes
Rx Buffer available
no
?
Receive Command
Ignore
Data
Send RxStatus = ReceiverBusy
no
Command ==
ControlStart
yes
First quadlet received successfully
Store quadlet in Rx Buffer
State = Continue
yes
Application
requests break
?
no
Rx Buffer available
no
?
yes
Ignore Command
Ignore Data
Send RxStatus = ReceiverBreak
Receive Command
Receive Data
Send RxStatus = ReceiverReady
Receive Command
Ignore Data
Send RxStatus = ReceiverBusy
Store quadlet in Rx Buffer
yes
Command ==
ControlContinue
?
Command ==
no
ControlBreak
?
no
yes
yes
Command ==
no
NoData
?
Command ==
ControlBreak
?
yes
no
Report Break received to Application,
discard current
packet
Command ==
ControlEnd
?
yes
Control Packet sent successfully
no Received Command is not valid
Report Protocol Error to Application,
discard current packet
Store quadlet in Rx Buffer
Ignore Command
Ignore
Data
Send RxStatus = ReceiverProtocolError
Synchronous
Synchronous stream data is sent in a continuous and broadcast fashion, without block information. Therefore,
receiving Devices must not respond to the synchronous command; thereby leaving RxStatus in the ReceiverReady
state (logic low).
For 3-pin MediaLB, the required pull-down on MLBS leaves this signal in the ReceiverReady
command when no synchronous data is transmitted on the MLBD line.
SAM E70/S70/V70/V71 Family
Media Local Bus (MLB)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 1343