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PIC18F242 Datasheet(PDF) 192 Page - Microchip Technology |
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PIC18F242 Datasheet(HTML) 192 Page - Microchip Technology |
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192 / 332 page  PIC18FXX2 DS39564C-page 190 © 2006 Microchip Technology Inc. FIGURE 18-2: LOW VOLTAGE DETECT (LVD) BLOCK DIAGRAM The LVD module has an additional feature that allows the user to supply the trip voltage to the module from an external source. This mode is enabled when bits LVDL3:LVDL0 are set to 1111. In this state, the com- parator input is multiplexed from the external input pin, LVDIN (Figure 18-3). This gives users flexibility, because it allows them to configure the Low Voltage Detect interrupt to occur at any voltage in the valid operating range. FIGURE 18-3: LOW VOLTAGE DETECT (LVD) WITH EXTERNAL INPUT BLOCK DIAGRAM LVDIF VDD LVDEN LVD Control Register Internally Generated Reference Voltage LVDIN 1.2V Typical – + LVD EN LVD Control BGAP BODEN LVDEN VxEN LVDIN Register VDD VDD Externally Generated Trip Point – + |
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