LAUER EPC-PM-1200TC PANEL

One comparator is built inside the PMC234/PMS234; Fig. 18 shows its hardware diagram. It can compare signals between two pins or with either internal reference voltage Vinternal R or internal band-gap reference voltage.

Comparator Hardware Diagram

The two signals to be compared, one will be the plus input of comparator and the other one is the minus input of comparator. For the minus input of comparator, it can be PC0/CIN3-, PC5/CIN+, Internal band-gap 1.20 volt, PA3/CIN1-, PA4/CIN2- or Vinternal R selected by bit [3:1] of gpcc register, and for the plus input of comparator, it can be PC5/CIN+ or Vinternal R selected by bit 0 of gpcc register. The comparator result can be enabled to output to PB0 directly, or sampled by rising edge of Time2 clock (TM2_CLK) which comes from Timer2 module. The output can be optional inversed the polarity by bit 4 of gpcc register, the comparator output can be used to request interrupt service or read out by gpcc register. The comparator is disabled after power-on reset and can be enabled by setting gpcc.7=1, the comparator module can be put into power-down mode only when issuing stopsys command which will put PMC234/PMS234 into power-down mode.

Analog Inputs

 A simplified circuit for the analog inputs is shown in the Fig. 19. All the analog input pins for comparator are shared function with a digital input which had reverse biased ESD protection diodes to VDD and GND, therefore, the analog input signal must be between VDD and GND.

                                                                        

Application industry

The products can be used in the following industries: power plant, paper making, steel, mining, rubber, water supply, cement, chemical industry, glass, printing

Textile, machinery, plastics, coatings, medicine, hospitals, food, hotels, scientific research institutions

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