PI0512WS Datasheet, PDF (5/8 Pages) AMI SEMICONDUCTOR – 512-Pixel 50-mm-Pitch Wide Aperture Spectroscopic Photodiode Array

I/O Pins
Although the PI0512WS package has 22 pins as shown in Figure 1, there are only 6
functionally active I/O pins in addition to the supply and bias pins as shown in Figure 5.
Table 1 defines the I/O acronyms, provides their full names and describes their functions. In
essence, only two clocks, CLK and START, are required for controlling the timing of the
sensor's video readout if the internal reset circuitry is not used. However, if the internal reset
circuitry is used, a third clock signal, RESET, is required. The remaining I/O descriptions are
for the video signal output, the end-of-scan signal, and the bias and supply voltage. These
I/Os are listed with their acronym designators and functional descriptions in the following
Table 1.
Table 1. Symbols and functions and I/O pins.
Symbol
VSS
VDD
START
CLK
EOS
AVIDEO
RESET
BIAS
Function and Description
Ground.
+5.0 Volts.
Start Pulse: Input to start the line scan.
Clock Pulse: Input to clock the shift register.
End Of Scan: Output from the shift register to indicate the
completion of one line scan.
Active Video Line: Charge output from the photodiodes pixels.
Reset Control Gate: Pulsing this input will reset the video line to
the reset bias.
Reset Bias Supply: Input bias reference resetting the video line.
PI0512WS Page 5 of 8 – July 26, 2001