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PIC14000 Datasheet(PDF) 32 Page - Microchip Technology |
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PIC14000 Datasheet(HTML) 32 Page - Microchip Technology |
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32 / 153 page  PIC14000 DS40122B-page 32 Preliminary © 1996 Microchip Technology Inc. 5.3 PORTD and TRISD PORTD is an 8-bit port that may be used for general purpose I/O. Four pins can be configured as analog inputs. FIGURE 5-8: BLOCK DIAGRAM OF PORTD<7:4> PINS FIGURE 5-9: BLOCK DIAGRAM OF PORTD<3:2> PINS D Q CK Q D Q CK Q D Q EN Analog Input Mode Data Bus Write PORTD Write TRISD Read TRISD Read PortD To A/D Converter Note: I/O pins have protection diodes to VDD and VSS. P N I/O Pin VSS VDD Schmitt Trigger Input Buffer D Q CK Q D Q CK Q D Q EN Data Bus Write PORTD Write TRISD Read TRISD I/O Pin Read PORTD Read PORTD 1. I/O pins have protection diodes to VDD and VSS. 2. If CMBOE (CMCON<5>) is set to ‘1’, RD2 becomes CMPB, RD3 becomes REFB, ignoring the PORTD<3:2> data and TRISD<3:2> register settings. Schmitt Trigger Input Buffer |
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