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PIC16F913E/SS301 Datasheet(PDF) 53 Page - Microchip Technology |
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PIC16F913E/SS301 Datasheet(HTML) 53 Page - Microchip Technology |
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53 / 272 page  © 2005 Microchip Technology Inc. Preliminary DS41250E-page 51 PIC16F917/916/914/913 3.4 PORTC and TRISC Registers PORTC is an 8-bit bidirectional port. PORTC is multiplexed with several peripheral functions. PORTC pins have Schmitt Trigger input buffers. All PORTC pins have latch bits (PORTC register). They, when written, will modify the contents of the PORTC latch; thus, modifying the value driven out on a pin if the corresponding TRISC bit is configured for output. EXAMPLE 3-3: INITIALIZING PORTC REGISTER 3-7: PORTC – PORTC REGISTER (ADDRESS: 07h) REGISTER 3-8: TRISC – PORTC TRI-STATE REGISTER (ADDRESS: 87h) Note: Analog lines that carry LCD signals (i.e., SEGx, VLCDy, where x and y are segment and LCD bias voltage identifiers) are shown as direct connections to the device pins. The signals are outputs from the LCD module and may be tri-stated, depending on the configuration of the LCD module. BCF STATUS,RP0 ;Bank 0 BCF STATUS,RP1 ; CLRF PORTC ;Init PORTC BSF STATUS,RP0 ;Bank 1 BCF STATUS,RP1 ; MOVLW FFh ;Set RC<7:0> as inputs MOVWF TRISC ; BCF STATUS,RP0 ;Bank 2 BSF STATUS,RP1 ; CLRF LCDCON ;Disable VLCD<3:1> ;inputs on RC<2:0> BCF STATUS,RP0 ;Bank 0 BCF STATUS,RP1 ; R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0 bit 7 bit 0 bit 7-0 RC<7:0>: PORTC I/O Pin bits 1 = Port pin is >VIH 0 = Port pin is <VIL Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ - n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 bit 7 bit 0 bit 7-0 TRISC<7:0>: PORTC Tri-State Control bits 1 = PORTC pin configured as an input (tri-stated) 0 = PORTC pin configured as an output Note: TRISC<7:6> always reads ‘1’ in XT, HS and LP OSC modes. Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ - n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown |
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