15
D026227_08 CR822x Single Board Decoded Scan Engine Integration Guide
4.7 – Power On (Boot) Timing Diagram
The
PwrDwn
signal will transition to HIGH
shortly after
V
in
is applied and will remain
HIGH until the reader is ready.
Parameter
Symbol
Min
Typical
Max
Unit
Time from Power On to
firmware ready to receive
commands
TPU
350
1500
3000
msec
TPU1
TPU3
TPU2
V
IN
nBeeper
nGoodRead
PwrDwn
