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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
I2C 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
I2C Data (Bi-Directional) – Devices Function as Auxiliary
Devices