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19.GND: main power supply ground.
20.STAND_MODE: Input, stand mode control signal, active high. When
21.GND: main power supply ground.
22.USER_LED: Output digital control, this configurable signal controls
23.GND: main power supply ground.
24.GND: main power supply ground.
25.OPERATING: Output digital signal, is High when the OEM decoder is
26.GND: main power supply ground.
27.RESERVED: GPIO reserved for future use. Keep floating.
Power Supply and I/O Voltage
OEM decoder can be powered either by micro-USB cable (via the 5V USB pin)
or 27 poles ZIF (via 4 dedicated pins, split into two different power rails VCC
and VCC ILLUM). The OEM decoder can detect which of the two is powering
it. If it is powered using micro-USB connector or if only VCC power rail is
supplied, the PWR_ON_CTRL signal behaves only as output and cannot be
used for forcing interface selection at boot (see paragraph
Sequence"
OEM decoder can be powered ranging from 3.3V to 5.5V both on VCC and
VCC ILLUM. After power up both power supplies can drop down to 3V with-
out issues, since PMIC wake up threshold is set to 3.0V + 200mV rising hys-
teresis by default when is powered off. After power up, brown-out voltage
on the PMIC is set to 2.8V, giving additional voltage margin.
If a good 5 volt supply is available, it is suggested to use it to power at least
VCC ILLUM (pins 17,18 on the 27 poles connector), provided that on the cur-
rent availability of that supply rail is sufficient for proper operation (see
Appendix A: Technical Specifications).
The I/O interface with the host is at 3.3V levels, with UART being at 3.3V TTL
levels.
The I/O interface towards the scan engines is at 3.3V levels, with the excep-
tion of MIPI signals being at MIPI compliant levels (1.2V single-ended in
LPmode and 200mV differential in HSmode). See MIPI D-PHY and CSI2 stan-
dard specification for additional details.
Power-up Sequence
At power up the OEM decoder starts boot sequence when the power supply
level reaches 3.2 V. The OEM decoder boot sequence is composed by:
•
•
To complete the boot sequence about 1100 ms are required; after this time
the decoder is ready for operation.
Integration Guide
high, activates the stand mode operation that is automatically trig-
gering the decoder by analyzing the changes on the images coming
from the 2D camera video stream.
an auxiliary LED. It is intended to be a digital signal, not a LED power
driver. 4ma max driving capability.
in OPERATING mode, acquiring images for decoding. 4ma max driv-
ing capability.
on page 11).
a bootloader phase: loads the application in memory; can be inter-
rupted for updating software.
an application initialize phase: the operating system boots and the
application is initialized for standard operation.
Electrical Interface
"Power-up
11
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