1. PIC16F887

2. Main Features Only 35 instructions to learn: Operating speed:
All single-cycle instructions except branches
Operating speed:
DC – 20 MHz oscillator/clock input
DC – 200 ns instruction cycle
Interrupt capability
8-level deep hardware stack
Direct, Indirect and Relative Addressing modes

3. Main Features Precision Internal Oscillator: Power savings
Factory calibrated to ±1%
Software selectable frequency range of
8 MHz to 31 kHz
Software tunable
Two-Speed Start-up mode
Crystal fail detect for critical applications
Clock mode switching during operation for
Power savings
Power-Saving Sleep mode
Wide operating voltage range (2.0V-5.5V)
Industrial and Extended Temperature range
Power-on Reset (POR)
Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
• Brown-out Reset (BOR) with software control Option

4. Main Features
• Enhanced low-current Watchdog Timer (WDT) with on-chip oscillator (software selectable nominal 268 seconds with full prescaler) with software enable
• Multiplexed Master Clear with pull-up/input pin
• Programmable code protection
• High Endurance Flash/EEPROM cell:
100,000 write Flash endurance
1,000,000 write EEPROM endurance
Flash/Data EEPROM retention: > 40 years
Program memory Read/Write during run time
In-Circuit Debugger (on board)

5. Main Features Low-Power Features: Standby Current:
50 2.0V, typical
• Operating Current:
11 μ 32 kHz, 2.0V, typical
220 μ 4 MHz, 2.0V, typical
• Watchdog Timer Current:
1 μ 2.0V, typical

6. Pinout and Family Differences

9. Oscillator

10. FOSC REGISTER

11. Parallel I/O (PIO) Ports

13. Parallel I/O (PIO) Ports

14. Timer 0

15. OPTION_REG = 0x84;

16. INTCON = 0xA0;
TMR0IF_bit = 0;

17. /*
* Project name:
LED_Blinking (Simple 'Hello World' project)
* Copyright:
(c) Mikroelektronika, 2009.
* Revision History: :
- initial release;
modified by Slavisa Zlatanovic;
* Description:
This is a simple 'Hello World' project. It turns on/off LEDs connected to
PORTA, PORTB, PORTC and PORTD.
* Test configuration:
MCU: PIC16F887
Dev.Board: EasyPIC6
Oscillator: HS, MHz
Ext. Modules: -
SW: mikroC PRO for PIC
* NOTES:
- Turn ON the PORT LEDs at SW9. */

18. void main() {
ANSEL = 0; // Configure AN pins as digital
ANSELH = 0;
C1ON_bit = 0; // Disable comparators
C2ON_bit = 0;
TRISA = 0x00; // set direction to be output
TRISB = 0x00; // set direction to be output
TRISC = 0x00; // set direction to be output
TRISD = 0x00; // set direction to be output
do {
PORTA = 0x00; // Turn OFF LEDs on PORTA
PORTB = 0x00; // Turn OFF LEDs on PORTB
PORTC = 0x00; // Turn OFF LEDs on PORTC
PORTD = 0x00; // Turn OFF LEDs on PORTD
Delay_ms(1000); // 1 second delay
PORTA = 0xFF; // Turn ON LEDs on PORTA
PORTB = 0xFF; // Turn ON LEDs on PORTB
PORTC = 0xFF; // Turn ON LEDs on PORTC
PORTD = 0xFF; // Turn ON LEDs on PORTD
} while(1); // Endless loop }

19. /*
* Project name:
Timer0_Interrupt (Using Timer0 to obtain interrupts)
* Copyright:
(c) Mikroelektronika, 2009.
* Revision History: :
- initial release;
modified by Slavisa Zlatanovic;
* Description:
This code demonstrates how to use Timer0 and it's interrupt.
Program toggles LEDs on PORTB.
* Test configuration:
MCU: PIC16F887
Dev.Board: EasyPIC6
Oscillator: HS, MHz
Ext. Modules: -
SW: mikroC PRO for PIC
* NOTES:
- Turn on LEDs on PORTB (switch SW9.2). */

20. unsigned cnt;
void interrupt() {
if (TMR0IF_bit) {
cnt++; // Increment counter
TMR0IF_bit = 0; // Clear TMR0IF
TMR0 = 96; }
void main() {
OPTION_REG = 0x84; // Assign prescaler to TMR0
ANSEL = 0; // Configure AN pins as digital
ANSELH = 0;
C1ON_bit = 0; // Disable comparators
C2ON_bit = 0;
TRISB = 0; // PORTB is output
PORTB = 0xFF; // Initialize PORTB
TMR0 = 96; // Timer0 initial value
INTCON = 0xA0; // Enable TMRO interrupt
cnt = 0; // Initialize cnt
do {
if (cnt >= 400) {
PORTB = ~PORTB; // Toggle PORTB LEDs
cnt = 0; // Reset cnt
} while(1);

21. unsigned cnt;
void interrupt() {
if (TMR0IF_bit) {
TMR0IF_bit = 0; // Clear TMR0IF
TMR0 = 255;
PORTB = ~PORTB; }
void main() {
OPTION_REG = 0x80; // Assign prescaler to TMR0
ANSEL = 0; // Configure AN pins as digital
ANSELH = 0;
C1ON_bit = 0; // Disable comparators
C2ON_bit = 0;
TRISB = 0; // PORTB is output
PORTB = 0xFF; // Initialize PORTB
TMR0 = 255; // Timer0 initial value
INTCON = 0xA0; // Enable TMRO interrupt
cnt = 0; // Initialize cnt

22. _interrupt:
MOVWF R15+0
SWAPF STATUS+0, 0
CLRF STATUS+0
MOVWF ___saveSTATUS+0
MOVF PCLATH+0, 0
MOVWF ___savePCLATH+0
CLRF PCLATH+0
;Timer0_Interrupt.c,28 :: void interrupt() {
;Timer0_Interrupt.c,29 :: if (TMR0IF_bit) {
BTFSS TMR0IF_bit+0, BitPos(TMR0IF_bit+0)
GOTO L_interrupt0
;Timer0_Interrupt.c,31 :: TMR0IF_bit = 0; // Clear TMR0IF
BCF TMR0IF_bit+0, BitPos(TMR0IF_bit+0)
;Timer0_Interrupt.c,32 :: TMR0 = 255;
MOVLW
MOVWF TMR0+0
;Timer0_Interrupt.c,33 :: PORTB = ~PORTB;
COMF PORTB+0, 1
;Timer0_Interrupt.c,34 :: }
L_interrupt0:
;Timer0_Interrupt.c,35 :: }
L_end_interrupt:
L__interrupt2:
MOVF ___savePCLATH+0, 0
MOVWF PCLATH+0
SWAPF ___saveSTATUS+0, 0
MOVWF STATUS+0
SWAPF R15+0, 1
SWAPF R15+0, 0
RETFIE
; end of _interrupt

24. CAPTURE/COMPARE/PWM MODULES (CCP1 AND CCP2)
This device contains one Enhanced Capture/Compare/PWM (CCP1) and Capture/Compare/PWM module(CCP2).
The CCP1 and CCP2 modules are identical in operation, with the exception of the Enhanced PWM features available on CCP1 only.
CCPRx and CCPx refer to CCPR1 or CCPR2 and CCP1 or CCP2, respectively.

31. Pinout and Family Differences

32. /*
* Project name:
PWM (PWM library Demonstration)
* Copyright:
(c) MikroElektronika, 2008.
* Revision History:
initial release;
modified by Slavisa Zlatanovic;
* Description:
This is a simple demonstration of PWM library, which is being used for
control of the PIC's CCP module. The module is initialized and started,
after which the PWM1 and PWM2 Duty Ratios can be adjusted by means of 4 buttons
connected to pins RA0, RA1, RA2 and RA3. The changes can be monitored on the CCP
output pins (RC1 and RC2).
* Test configuration:
MCU: PIC16F887
Dev.Board: EasyPIC6
Oscillator: HS, MHz
Ext. Modules: -
SW: mikroC PRO for PIC
* NOTES:
- Pull-down PORTA and connect button jumper (J17) to Vcc.
- Turn on LEDs on PORTC SW9.3. */

33. PWM2_Init(5000 seem to override PWM1_Init(5000
unsigned short current_duty, current_duty1;
void InitMain() {
ANSEL = 0; // Configure AN pins as digital
ANSELH = 0;
C1ON_bit = 0; // Disable comparators
C2ON_bit = 0;
PORTA = 255;
TRISA = 255; // Configure PORTA pins as input
PORTB = 0; // Set PORTB to 0
TRISB = 0; // Designate PORTB pins as output
PORTC = 0; // Set PORTC to 0
TRISC = 0; // Designate PORTC pins as output
PWM1_Init(5000); // Initialize PWM1 module at 5KHz
PWM2_Init(5000); // Initialize PWM2 module at 5KHz }
PWM2_Init(5000 seem to override PWM1_Init(5000

34. void main() {
InitMain();
current_duty = 30; // Initial value for current_duty
current_duty1 = 30; // Initial value for current_duty1
PWM1_Start(); // Start PWM1
PWM2_Start(); // Start PWM2
PWM1_Set_Duty(current_duty); // Set current duty for PWM1
PWM2_Set_Duty(current_duty1); // Set current duty for PWM2
while (1) { // Endless loop
if (RA0_bit) { // Button on RA0 pressed
Delay_ms(40);
current_duty++; // Increment current_duty
PWM1_Set_Duty(current_duty); }
if (RA1_bit) { // Button on RA1 pressed
current_duty--; // Decrement current_duty
if (RA2_bit) { // Button on RA2 pressed
current_duty1++; // Increment current_duty1
PWM2_Set_Duty(current_duty1);
if (RA3_bit) { // Button on RA3 pressed
current_duty1--; // Decrement current_duty1
if (RA5_bit) { // Button on RA3 pressed
PORTC.B0 = ~ PORTC.B0;
// current_duty = current_duty;
Delay_ms(1000);
Delay_ms(5); // Slow down change pace a little

35. /*
* Project name:
Button (Demonstration of using Button Library)
* Copyright:
(c) Mikroelektronika, 2009.
* Revision History: :
- initial release;
modified by Slavisa Zlatanovic;
* Description:
This program demonstrates usage on-board button as PORTB input.
On every RB0 one-to-zero transition PORTC is inverted.
* Test configuration:
MCU: PIC16F887
Dev.Board: EasyPIC6
Oscillator: HS, MHz
Ext. Modules: -
SW: mikroC PRO for PIC
* NOTES:
- Turn ON the PORTC LEDs.
- Put button jumper (J17) into VCC position and pull-down PORTB. */

36. bit oldstate; // Old state flag
void main() {
ANSEL = 0; // Configure AN pins as digital I/O
ANSELH = 0;
C1ON_bit = 0; // Disable comparators
C2ON_bit = 0;
TRISB0_bit = 1; // set RB0 pin as input
TRISB = 0b ;
PORTB = 0x00;
TRISC = 0x00; // Configure PORTC as output
PORTC = 0xAA; // Initial PORTC value
oldstate = 0;
do {
if (Button(&PORTB, 0, 1, 1)) { // Detect logical one
oldstate = 1; // Update flag }
if (oldstate && Button(&PORTB, 0, 1, 0)) { // Detect one-to-zero transition
PORTC = ~PORTC; // Invert PORTC
oldstate = 0; // Update flag
if (RB1_bit == 1) { // Detect one-to-zero transition
} while(1); // Endless loop

37. Switch + LED (SWITCH12) void main () { ADPCFG = 0xFFFF;
TRISF=0b000001;
PORTF=0x00;
while(1)
if((PORTF&0b000001)==1) // Switch at PORTF Bit 0
{PORTF.F1=PORTF.F1^1;} // Toggles PORTF Bit 1 }

38. Key DEBOUNCING

39. Key DEBOUNCING – 1 (SWITCH2)
void main () {
int i;
const int Tenms = 16667;
ADPCFG = 0xFFFF;
TRISF=0b000001;
PORTF=0x00;
while(1)
i = 0; // Wait 10 ms for Button Up
while (i < Tenms)
if (1 == PORTF.F0) // Button Down/Start over
i = 0; }
else // Button Up/Increment Count
i = i + 1;
} //
i = 0; // Wait 10 ms for Button Down
if (0 == PORTF.F0 ) // Button Up/Start over
else // Button Down/Increment Count
PORTF.F1=PORTF.F1^1; // Toggle LED to Turn ON/OFF LED
Adapted from 123 PIC Experiments for the EVIL GENIOUS by MYKE PREDKO

40. Key DEBOUNCING – 1 (SWITCH2)
;SWITCH2.c,24 :: while (i < Tenms)
$0144 $ L_main_6:
$0144 $ ADD W14, #0, W0
$0146 $ MOV [W0], W2
$0148 $4700E2 ADD W14, #2, W1
$014A $ SUB W2, [W1], W0
$014C $3D000D BRA GE L_main_7, L_main_7
;SWITCH2.c,25 :: if (0 == PORTF.F0) // Button Up/Start over
$014E $ MOV PORTF, W0
$0150 $6000E1 AND W0, #1, W1
$0152 $ SUBR W1, #0, W0
$0154 $3A BRA NZ L_main_8, L_main_8
;SWITCH2.c,26 :: i = 0;
$0156 $ MOV #0, W0
$0158 $780F00 MOV W0, [W14]
$015A $ GOTO L_main_9
$015E $ L_main_8:
;SWITCH2.c,28 :: i = i + 1;
$015E $ MOV #1, W1
$0160 $ ADD W14, #0, W0
$0162 $ ADD W1, [W0], [W0]
$0164 $ L_main_9:
$0164 $ GOTO L_main_6
$0168 $ L_main_7:
;SWITCH2.c,30 :: PORTF.F1=PORTF.F1^1; // Toggle LED to Turn

41. Capture Mode

42. Compare Mode

43. PWM

44. Period in multiples of 4/fosc
Resolution in multiples of 1/fosc
Least significant bits of extended TMR2
Change at oscillator frequency

50. void InitMain() {
ANSEL = 0; // Configure AN pins as digital
ANSELH = 0;
C1ON_bit = 0; // Disable comparators
C2ON_bit = 0;
PORTC = 0; // Set PORTC to 0
TRISC = 0; // Designate PORTC pins as output }
void main() {
InitMain();
PR2 = 0x65;
T2CON = 0X04;
CCP2CON = 0X3F;
CCPR2L = 0X0F;

51. PWM