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PIC14000 Datasheet(PDF) 33 Page - Microchip Technology |
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PIC14000 Datasheet(HTML) 33 Page - Microchip Technology |
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33 / 153 page  © 1996 Microchip Technology Inc. Preliminary DS40122B-page 33 PIC14000 FIGURE 5-10: BLOCK DIAGRAM OF PORTD<1:0> PINS FIGURE 5-11: PORTD DATA REGISTER Legend: U = unimplemented, read as ‘0’, x = unknown. 08h Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 PORTD RD7/AN7 RD6/AN6 RD5/AN5 RD4/AN4 RD3/REFB RD2/CMPB RD1/SDAB RD0/SCLB Read/Write R/W R/W R/W R/W R/W R/W R/W R/W POR value xxh XXXX X X X X Bit Name Function B7 RD7/AN7 GPIO or analog input. Returns value on pin RD7/AN7 when used as a digital input. When configured as an analog input, reads as ‘0’. B6 RD6/AN6 GPIO or analog input. Returns value on pin RD6/AN6 when used as a digital input. When configured as an analog input, reads as ‘0’. B5 RD5/AN5 GPIO or analog input. This pin can connect to a level shift network. If enabled, a +0.5V offset is added to the input voltage. When configured as an analog input, reads as ‘0’. B4 RD4/AN4 GPIO or analog input. Returns value on pin RD4/AN4 when used as a digital input. When configured as an analog input, reads as ‘0’. B3 RD3/REFB This pin can serve as a GPIO, or programmable reference B output. B2 RD2/CMPB This pin can serve as a GPIO, or comparator B output. B1 RD1/SDAB Alternate synchronous serial data I/O for I2C interface enabled by setting the I2CSEL bit in the MISC register. This pin can also serve as a general purpose I/O. This pin has an N-channel pull-up to VDD which is disabled in I2C mode. B0 RD0/SCLB Alternate synchronous serial clock for I2C interface, enabled by setting the I2CSEL bit in the MISC register. This pin can also serve as a general pur- pose I/O. This pin has an N-Channel pull-up to VDD which is disabled in I2C mode. D Q CK Q D Q CK Q D Q EN Data Bus Write PORTD Write TRISD Read TRISD Read PortD Note: I/O pins have protection diodes to VDD and VSS. These pins do not have a P-channel pull-up. N N I/O Pin VSS VDD Schmitt Trigger Input Buffer I2CCON<5> |
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