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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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INTEDG датащи(PDF) 345 Page - Microchip Technology |
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INTEDG датащи(HTML) 345 Page - Microchip Technology |
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345 / 478 page  2010-2012 Microchip Technology Inc. DS41414D-page 345 PIC16(L)F1946/47 27.5.3 AUTOMATIC POWER MODE SWITCHING As an LCD segment is electrically only a capacitor, cur- rent is drawn only during the interval where the voltage is switching. To minimize total device current, the LCD internal reference ladder can be operated in a different power mode for the transition portion of the duration. This is controlled by the LCDRL Register (Register 27-7). The LCDRL register allows switching between two power modes, designated ‘A’ and ‘B’. ‘A’ Power mode is active for a programmable time, beginning at the time when the LCD segments transition. ‘B’ Power mode is the remaining time before the segments or commons change again. The LRLAT<2:0> bits select how long, if any, that the ‘A’ Power mode is active. Refer to Figure 27-4. To implement this, the 5-bit prescaler used to divide the 32 kHz clock down to the LCD controller’s 1 kHz base rate is used to select the power mode. FIGURE 27-4: LCD INTERNAL REFERENCE LADDER POWER MODE SWITCHING DIAGRAM – TYPE A Single Segment Time ‘H00 ‘H01 ‘H02 ‘H03 ‘H04 ‘H05 ‘H06 ‘H07 ‘H0E ‘H0F ‘H00 ‘H01 ‘H3 Power Mode A Power Mode B Mode A LRLAT<2:0> 32 kHz Clock Ladder Power Segment Clock LRLAT<2:0> Segment Data Power Mode COM0 SEG0 COM0-SEG0 Control V0 V1 V0 V1 V0 V1 -V1 |
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