Motorola SE4710, Integration Manual

Page: 53 / 82

Control Interface 5 - 5
Command Descriptions
See Table 5-3 on page 5-11 for command and response formats for all SE4710 commands.
ACQUISITION 0x58
ACQUISITION Start causes the SE4710 to output image data on the camera interface. ACQUISITION Stop stops
the image data output.
After receiving the Stop command, the SE4710 may not respond to subsequent commands for up to one frame
time (33 ms at 30 fps) because the system requires the current frame to complete before the engine processes
new commands. Issuing commands during this time results in unacknowledged I
2
C commands, requiring
command retries.
ACQUISITION_MODE 0x5B
Optimizes the engine’s behavior for bar code decoding, image capture, motion detection, or aiming pattern
capture.
AIM 0x55
Turns the aiming pattern on and off.
AIM_DURING_EXPOSURE 0x56
When enabled, this keeps the aiming pattern on when capturing an image, meaning the pattern is visible in the
image. When disabled, the aiming pattern is not visible in acquired images. The default is disabled.
Enabling AIM_DURING_EXPOSURE has no effect unless AIM is also on. Enabling AIM_DURING_EXPOSURE
while acquisition is stopped does not turn aiming on, although it turns aiming on upon the next ACQUISITION Start
command.
AIM_POWER 0xF3
Sets the aim brightness.
AUTO_POWER_REDUCTION 0x74
Places the SE4710 in a low power state when idle for the duration of time specified by the
TIME_TO_LOW_POWER command. Any I
2
C command wakes the SE4710 from low power mode.
The SE4710 is considered idle only if acquisition is stopped and aim is off. While acquisition is started, or aim is on,
the SE4710 does not automatically enter low power mode.
DRIVE_STRENGTH 0x99
Use this command to set the appropriate parallel interface drive strength for the integration, and chosen
VDD_IO_HOST voltage level.
NOTE The camera interface must be setup using IMAGER_INTERFACE_TYPE (0x86) prior to the execution of
the ACQUISITION start command. (see page
5-8 ) .
NOTE The engine is designed to always NAK the first I
2
C character when the engine is in low power mode. The
host must initiate an I
2
C retry before the time specified by TIME_TO_LOW_POWER.