PI324MC-A4 datasheet(2/9 Pages) AMI

2 / 9 page

but they are still contiguously aligned in a single row. See Figure 1, the module's block

diagram. This configuration lends to a positional stream of video pixels whether they are

read in parallel or sequentially from the two output ports, i.e., at the end of the first

section's array, pixel number 1247, the following 1st pixel of the second section continues

as position 1248 and sequences up to pixel 2592 or the end, pixel 1344 of the end second

section.

Each chip contains a set of multiplex switches, and a digital shift register to control the

chips sequential readout. Additionally, the chips contain a chip selection switch that is

interrogated in a sequence as each predecessor chip completes its scanning process.

Since this module has two output ports from two independently controlled section of chips,

to operate both sections, the users are required to enter a set of control clocks and power

into each section through the two provided connectors located on each end of the module.

Figure 1. PI324MC-A4 module block diagram.

(See Table 1 for pin-out designation)

Located on the next page is Figure 2 depicting a cross sectional pictorial of the module.

Mounted in the module is one-to-one graded indexed micro lens array that focuses the

scanned documents' image onto the chip's sensing line. The sensing line is located along

the module's sensor axis, known as the read line. These photon images are transformed

into proportional video charges and processed by two on-board amplifiers. The video

signal from the amplifier transmits a sequential stream of video pixels to video output pin

of the PI324MC-A4 module. Also mounted in housing is a LED light source. Figure 2

shows LED bar and its illumination path. The path traces the ray from the LED and

reflected from the document and focused through the ROD lens and onto the sensors. All

these components are housed in a small plastic housing with a cover glass. The cover

glass serves as window with outside surface as the focal point for the image on the

document. It also serves to protect the imaging array, the micro lens assembly, and the

LED light source from dust.

VLED

GLED

BUFFER

VIDEO AMPL

BUFFER

SHIFT REGISTER

ROD LENSE

PHOTO SENSORS

1 2 3 4

1246

1247

1248

1 2 3

1342

1343

1344

LED

PAGE 2 OF 9 - PI324MC-A4, 11-15-00

PI324MC-A4 Datasheet(PDF) 2 Page - AMI SEMICONDUCTOR

PI324MC-A4 Datasheet(HTML) 2 Page - AMI SEMICONDUCTOR

Html Pages

1 2 3 4 5 6 7 8 9

Datasheet Download

Link URL