16
D026227_08 CR822x Single Board Decoded Scan Engine Integration Guide
4.8 – Power Down Timing Diagram
4.9 – Sleep to Wakeup Timing Diagram
Power (
V
in
) can be removed at any time except
when the unit is performing an upgrade.
Removing power during an upgrade may
cause the unit to become unusable.
Parameter
Symbol
Min
Typical
Max
Unit
Note
Time from Power Off to
all outputs low
TPD1
0.62
msec
5V
0V
V
IN
5V
0V
Outputs
TPU1
Outputs: PwrDwn, nGoodRead, nBeeper
Signal
Description
Min
Typical
Max
Unit
T
wUpw
nWakeUp
pulse width
10
10
msec
T
wU
Time between
nWakeUp
asserted and
CR822x ready
10
11
12
msec
T
ready
Time between CR822x ready and when
nTrigger
can be asserted
0
0
0
msec
T
decode
Time between
nTrigger
asserted and
nGoodRead
asserted (decode time)
99
msec
T
grpw
nGoodRead
pulse width
Programmable
T
TimeoUT
Time between data transfer and sleep state
Programmable
msec
Notes:
Trigger can also be used to wake unit.
T
WUPW
nWakeUp
T
WU
T
CMDDELAY
PwrDwn
T
DECODE
nTrigger
T
SU
T
GRPW
nGoodRead
T
TIMEOUT
DATA
Data
Wake-Up Barcode Read Timing Diagram
