Grass Valley 2200 - Manual (Page 17)

2-3
Editor Protocol Access
Figure 2-3. Serial Interface Protocol State Diagram
Idle
Power On
– or –
Reset
Transmit
Negative
‘Ack’ (85H)
Active
Transmit
‘Ack’ (84H)
Transmit
Protocol
Error Msg
(01 40)
Transmit
Protocol
Accept Msg
(01 80)
Transmit
Data Msg
Validate
Msg Block
Execute
Msg Block
Selected
Transmit
Negative
‘Ack’ (85H)
Transmit
‘Ack’ (84H)
Valid Break
– or –
Timeout
Valid
Break
Line Error
– or –
Invalid Address
Valid
Poll Address
(31H)
Valid Select
Address (30H)
Line Error
Valid
Break
Timeout
Fails
“Write” Msg
“Read” Msg
“Read”
Msg
“Write”
Msg