17
D026227_08 CR822x Single Board Decoded Scan Engine Integration Guide
Notes:
1. Tic is dependent on image size.
2. Trigger must be asserted for Trigger Confirmation Time.
3. Trigger Confirmation Time defaults to zero and is adjustable.
4.10 – Image Capture Timing Diagram
Image acquisition and decoding can be started from either the nTrigger
line or via a communications channel command. The time required to
capture an image can vary depending on the size of image selected, the
confirmation time configuration, and where the imager is in the capture
cycle. The time to decode an image can depend on the image quality,
complexity of the barcode, etc. The maximum time spent trying to decode
an image defaults to 320ms and can be controlled by a configuration
command.
Parameter
Symbol
Min
Typ
Max
Unit
Note
Time from Trigger Accepted to
Image Capture Complete
T
ic
5
32
100
msec
1
Minimum Trigger duration
T
Tmin
10
20
N/A
2
Trigger Confirmation Time
T
TcT
0
0
see note
msec
3
T
TMIN
T
TCT
TRIGGER ACCEPTED
IMAGE CAPTURE COMPLETE
T
IC
Image Capture and Decode Timing
nTrigger
4.11 – Ribbon Cable Diagram (Decode Board to Host Interface)
Our ribbon cables have the following characteristics:
1:
Bottom contact on mating end
2:
12 pin
3:
0.5 mm pitch
4:
0.3 mm thickness with stiffener
Our ribbon cables have contacts on the same side of each end. Please
take this into account with respect to the control signals when designing
the mating connector pinout on the host interface.
The Development Kits, CR822x-DKX, use a ribbon cable with opposite
side contacts.
3.3V operation is only possible with 152.4 mm [6.0”] or shorter ribbon
cable.
Three ribbon cables are available with the following SKUs and lengths:
SKU
Length
C800
50.8 mm [2.0”]
C801
152.4 mm [6.0”]
C802
304.8 mm [12.0”]
.305
[.012]
CABLE LENGTH
6.00
[.236]
3.556
[.14]
.50
[.020]
.356
[.014]
6.50
[.256]
5.50
[.217]
.28
[.011]
