Symbol SE 923, Integration Manual

Page: 43 / 238

3-7
SE-923-I000A Specifications
Electrical Interface
Table 3-3 lists the pin functions of the SE-923 interface and illustrates typical input and
output circuitry.
Table 3-3. Electrical Interface
Mnemonic No. Type Name and Function
NC 1 Not connected. Reserved for future versions of the SE-923.
VBATT 2 Power Supply : This is the power supply voltage for the SE-923.
GND 3 Ground: 0 V reference.
RXD
CTS*
AIM/WAKE*
TRIG*
4
6
11
12
I
I
I
I
Received Data: Serial input port
Clear to Send: Serial port handshaking line
Wake Up: When the SE-923 is in the low power mode, pulsing
this pin low for 200 nsec awakens the SE-923.
Trigger: This pin is the hardware triggering line. Driving this pin
low causes the SE-923 to start a scan and decode session.
Min. Max. Condition
V
IL
-0.3 1.0 V
CC
= 3.3
V
IH
3.85 V
BATT
+0.3 V
CC
= 5.5
Note: Signal names with the “*” modifier are asserted when at the ground level (active low).
Signal names without the “*” modifier are asserted when at the positive supply voltage
level (active high).
V
SCHOTTKY
SILICON
DIODE
INPUT
CC
10k