Metrologic Instruments IS4921 - Manual (Page 44)

38
Imaging Engine and Decode PCB Terminations
Imaging Engine Interface Connector
Figure 32. Imaging Engine Interface Connector
Pin Signal Name Function
1 Aimer High enables Targeting LED (Input)
2 Illum_On High forces on Illumination LEDs (Input), Wake up Engine
3 Trigger Controls Integration and Illumination in Snapshot mode (Input)
4 SDA I2C data (Bi-Directional) – Devices Functions as Auxiliary Devices
5 SCL I2C clock (Bi-Directional) – Devices Function as Auxiliary Devices
6 VLED Voltage Supply for Targeting and Area LEDs (3V - 5.5V)
7 D0 Pixel Data0 (LSB) (Output)
8 Vimager Camera Voltage (3.1V - 3.5V)
9 D1 Pixel Data1 (Output)
10 D2 Pixel Data2 (Output)
11 D3 Pixel Data3 (Output)
12 PCLK Pixel Clock (Output)
13 D7 Pixel Data7 (Output)
14 D6 Pixel Data6 (Output)
15 D5 Pixel Data5 (Output)
16 D4 Pixel Data4 (Output)
17 VSYNC Vertical Sync (Output)
18 HSYNC Horizontal Sync (Output)
19 GND Power and Signal ground
20 Reserved Terminate with Resistor, Pulled Low, or Leave Unconnected
21 GND Power and Signal Ground
22 NC No Connection
* In the Phillips I2C specification auxiliary is defined as slave.