Pic16f690 Serial Communication C Code Syntax. Microchip PIC micros and CC sample code for PIC micros and Hi- Tech CSample projects for. Pic16f690 Serial Communication C Code Syntax. Serial Port and RS- 2. In this tutorial we are going to learn how use TX & RX pins for serial communication to your PC.

In order to synchronize the operation of I/O ports with the internal 8-bit organization of the microcontroller, they are, similar to registers, grouped into five ports denoted by A, B, C, D and E. All of them have several features in common: • For practical reasons, many I/O pins are multifunctional. If a pin performs any of these functions, it may not be used as a general-purpose input/output pin. • Every port has its ‘satellite’, i.e. The corresponding TRIS register: TRISA, TRISB, TRISC etc. Which determines the performance of port bits, but not their contents.

By clearing any bit of the TRIS register (bit=0), the corresponding port pin is configured as an output. Similarly, by setting any bit of the TRIS register (bit=1), the corresponding port pin is configured as an input. This rule is easy to remember 0 = Output, 1 = Input. RA0 = AN0 (determined by the ANS0 bit of the ANSELregister) RA1 = AN1 (determined by the ANS1 bit of the ANSELregister) RA2 = AN2 (determined by the ANS2 bit of the ANSELregister) RA3 = AN3 (determined by the ANS3 bit of the ANSELregister) RA5 = AN4 (determined by the ANS4 bit of the ANSELregister) Similar to bits of the TRISA register determine which of the pins are to be configured as inputs and which ones as outputs, the appropriate bits of the ANSEL register determine whether pins are to be configured as analog inputs or digital inputs/outputs. Each bit of this port has an additional function related to some of the built-in peripheral units, which will be described in later chapters.

This chapter covers only the RA0 pin’s additional function since it is related to port A and the ULPWU unit. Let's do it in mikroC. // The PORTA.2 pin is configured as a digital input.

// All other PORTA pins are digital outputs ANSEL = ANSELH = 0; // All I/O pins are configured as digital PORTA = 0; // All PORTA pins are cleared TRISA = 0b00000100; // All PORTA pins except PORTA.2 are configured as outputs. Easycap 4 Channel Usb Dvr Driver For Windows 7. ULPWU UNIT The microcontroller is commonly used in devices which operate periodically and completely independently using a battery power supply. Minimum power consumption is one of the priorities here. Typical examples of such applications are: thermometers, fire detection sensors and the like. It is known that a reduction in clock frequency reduces the power consumption, thus one of the most convenient solutions to this problem is to slow down the clock, i.e. To use 32KHz quartz crystal instead of 20MHz. The principle of operation is simple: A pin is configured as an output and a logic one (1) is brought to it.