TSS463-AAR ATMEL [ATMEL Corporation], TSS463-AAR Datasheet - Page 46

• Manufacturer Part Number: TSS463-AAR
• Description: VAN Data Link Controller with Serial Interface
• Manufacturer: ATMEL [ATMEL Corporation]

46
TSS463-AA
The second case is that another module on the bus replies with an in-frame reply. In this
case the message type will pass immediately into the after reception state, without pass-
ing the after transmission state.
In the third case the TSS463AA has not yet started to transmit the reply request, when
another module either requests a reply, and gets it, or transmits a deferred reply. Warn-
ing! This should be avoided as it may result in an illegal message type (Illegal reply
Request).
The immediate Reply Message will attempt to transmit an in-frame reply, using the data
in the message buffer.
Above a Deferred Reply Message is shown. This message type will immediately trans-
mit a deferred reply frame.
Finally there is the Reply Request Detector Message type. Its purpose is to receive a
reply request frame and notify the processor, without transmitting an in-frame reply.
The table above shows all inactive messages types. The last combination will transmit a
reply request, but will not receive the reply since its buffer is tagged as occupied.
Illegal reply request
After transmission
After transmission
(of reply request)
Recommended
After reception
After reception
After reception
After reception
Initial setup
Initial setup
Initial setup
Initial setup
Reply Request Message without transmission
Don’t care
RNW
RNW
RNW
RNW
RNW
Reply Request Detection Message
1
1
1
1
1
1
1
1
0
0
1
Immediate Reply Message
Deferred Reply Message
Inactive Message
Don’t care
RTR
RTR
RTR
RTR
RTR
1
1
0
0
0
0
0
0
0
1
1
Unchanged
Don’t care
Don’t care
CHTx
CHTx
CHTx
CHTx
CHTx
0
1
0
1
1
1
1
1
0
4205B–AUTO–12/04
Don’t care
CHRx
CHRx
CHRx
CHRx
CHRx
0
1
0
1
1
1
0
1
1
1
1