Symbol SE 2223, Integration Manual

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1-5
Getting Started
Decoder
The heart of the decoder is a micro-controller that provides the necessary intelligence for
bar code decoding, host I/O interface protocol, and general decoder maintenance.
Power Management
The SE 2223/3223 has two power modes:
• Continuous Power
• Low Power.
In Continuous Power mode, the SE 2223/3223 always waits for a trigger pull or serial
communication.
In Low Power mode, the SE 2223/3223 draws less current than when in Continuous Power
mode, making it more suitable for battery powered applications. The SE 2223/3223 can be
put into Low Power mode via the SSI
SLEEP command. See the Simple Serial Interface
(SSI) Programmer’s Guide , p/n 72-40451-XX
The SE 2223/3223 must be awakened from the Low Power mode before performing any
functions.
When the SE 2223/3223 is in the Low Power mode, the PWRDWN signal is asserted. This
signal alerts the host that the SE 2223/3223 is in sleep mode. Table 1-1 shows how to
put the SE 2223/3223 into Low Power mode. Table 1-2 shows how to awaken it.
Table 1-1. Putting the SE 2223/3223 into Low Power Mode
Action Behavior
Send the serial SLEEP command The SE 2223/3223 enters Low Power mode only once, as soon
as possible.
Note:
All Wake Up signals (see Table 1-2) must be inactive in order to enter Low Power mode.
Table 1-2. Waking Up the SE 2223/3223
Signal State to Wake Up
AIM/WKUP* Low
TRIG* Low