Gpio (General Purpose Inputs And Outputs); Overview; Lut (Look Up Table) - IAI cm-140ge User Manual

CM-140GE / -RA/-UV / CB-140GE / -RA

6. GPIO (General purpose inputs and outputs)

6.1. Overview

All input and output signals pass through the GPIO (General Purpose Input and Output) module.
The GPIO module consists of a Look-Up Table (LUT – Cross-Point Switch), 4 Pulse Generators and a
12-bit counter. In the LUT, the relationship between inputs, counters and outputs is governed by
internal register set-up.
Digital I/O(GPIO) setting
0 LVAL IN
1 DVAL IN
2 FVAL IN
3 EEN IN
4 OPT IN 1
5 OPT IN 2
Soft Trigger 0
12
13 Soft Trigger 1
Soft Trigger 2
14
15 Soft Trigger 3
16
Pulse Generator 0
17 Pulse Generator 1
18 Pulse Generator 1
19 Pulse Generator 1
Setting for
Line Source
Counter Clock Source
25 MHz
0
Pixel Clock
1
On the above block diagram, Trigger 0 is used for Exposure and Trigger 1 is used for Delayed
Readout. The Time Stamp Reset can reset the time stamp complied with GigE Vision standard.
This is used for having the same time stamp in case of using multiple cameras.
The blocks shown in the above diagram have the following functionality:

6.1.1. LUT (Look Up Table)

The LUT works as a cross-point switch which allows connecting inputs and outputs freely. The
signals LVAL_IN, DVAL_IN, FVAL_IN and EEN_IN all originate from the camera timing circuit.
Trigger 0 is connected to the camera's timing circuit and is used for initiating triggered exposure.
Trigger 1 is used for Delayed Readout mode.
The Time Stamp Reset signal is used to reset the camera's time stamp function, also making it
possible to reset and synchronize the time stamp of multiple cameras.
( Cross Point Switch )
Pulse Generator 3
(20 bit Counter )
Pulse Generator 2
(20 bit Counter )
Pulse Generator 1
OUT
(20 bit Counter )
Pulse Generator 0
(20 bit Counter )
12 bit
Counter
Counter Divide by value
0 Bypass
1 - 4095 1/2 to 1/4096
LUT
IN
- 10 -
Digital I/O(GPIO) setting
TRIGGER 0 0
TRIGGER 1 1
PORT 1 1 4
PORT 2 5
Time Stamp Reset 16
Pulse Generator 0
12
Pulse Generator 1
13
Pulse Generator 2 14
Pulse Generator 3
15
Setting for
Line Selector
Pulse Generator Setting 3
Pulse Generator Setting 2
Pulse Generator Setting 1
Pulse Generator Setting 0
Length counter 0
Start Point Counter 0 ( 1)
Start Point Counter 0 (2) for repeat
End point counter 0
Counter 0 clear