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PIC18F4539-E/MLSQTP Datasheet(PDF) 192 Page - Microchip Technology |
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PIC18F4539-E/MLSQTP Datasheet(HTML) 192 Page - Microchip Technology |
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192 / 322 page  PIC18FXX39 DS30485A-page 190 Preliminary 2002 Microchip Technology Inc. FIGURE 19-2: 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 19-3). 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 19-3: 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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