31
Is the
ENC_SEL line
high?
Yes
No
Power Up
Set status lines
according to
assignments
Yes
No
All status lines
are inputs
All status lines
are outputs
Set as encoder
Initialize and pull
all outputs low
Has an
address been
created?
Is the
ENC_SEL
line high?
Is the
SEL_BAUD
line high?
Yes
No
Set the baud rate
to 9,600bps
Set the baud rate
to 28,800bps
No
Sleep
No
Yes
No
Yes
Go to
Transmit
Mode
No
Sleep
No
Yes
Pull the TR_PDN
line low
Pull the TR_PDN
Line High
Pull the TR_PDN
Line Low
Set the OFF timer
to 90%
Stop the OFF
Timer
Yes
No
Set the ON timer
time to 10%
Encoder only?
Are any status
lines high?
Is the
CRT/LRN line
high?
Is the
TR_DATA line
high?
Are any status
lines high?
Is the
CRT/LRN line
high?
No
ON timer
timeout?
Mode
Select
Yes
No
Yes
No
Pull the CONFIRM
line low
No
Yes
Go to
Mode
Select
Assemble the
packet
Send the packet
Yes
No
Pull the CONFIRM
line high
Set to Transmit
Mode
Set to Receive
Mode
Transmit
Mode
Did the
Confirm Bounce
timer timeout?
Are any status
lines high?
Did the
Confirm Wait
timer timeout?
Any valid
confirmation
data?
Set to Transmit
Mode
Go to
Config.
Mode
Go to
Config.
Mode
Go to
Receive
Mode
Figure 25: MT Series Transcoder Power-up Flowchart
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