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26
Decode Printed Circuit Board Terminations
USB Decode PCB, 3.3V
12-Pin ZIF Connector
Pin Signal Name
Function
1
No Connect No Connection
2
+3.3V
Power: Supply Voltage Input, +3.3V
± 0.3V
3
GND
Ground: Power and Signal Ground
4
D-
Input: USB D- Signal
5
<reserved>
Pin Function Reserved
6
D+
Input: USB D+ Signal
7
<reserved>
Pin Function Reserved
8
PWRDWN
Output: Active High = IS4823 is in Power Down Mode
9 nBEEPER
Output: Active Low, Signal Capable of Sinking Current
See
Detailed Electrical Specifications
starting on page 23.
10 nGood
Scan
Output: Active Low, Signal for Sinking Current (Good Scan)
See
Detailed Electrical Specifications
starting on page 23.
11 nEXT
Wake
Input: Active Low, Wakes Engine From Suspend or Sleep
Mode
12 EXT
Trig
Input: Active Low, Signal Used as Trigger Input to Activate
the Engine
10-Pin ZIF Connector
Pin Signal Name
Function
1 SDA
I
2
C Data (Bi-Directional) – Devices Function as Auxiliary
Devices
2
GND
Ground: Power and Signal Ground
3
GND
Ground: Power and Signal Ground
4 Scan
Sense
Level changes from High to low or low to high when the
laser changes direction at the start of the scan line
High = Bar
5 Data
Low = Space
High = Engine OFF
6 Scan
Enable
Low = Engine ON
High = Laser OFF
7 Laser
Enable
Low = Laser ON
8 NC
No
Connection
9
+3.3V
Power: Supply Voltage Input, +3.3V ± 0.3V
Figure 18.
10 SCL
I
2
C Data (Bi-Directional) – Devices Function as Auxiliary
Devices