PIC16F818_13 Datasheet, PDF (171/178 Pages) Microchip Technology – 18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology

Timer1 ................................................................................ 57
Associated Registers ................................................. 62
Capacitor Selection .................................................... 60
Counter Operation ..................................................... 58
Operation ................................................................... 57
Operation in Asynchronous Counter Mode ................ 59
Operation in Synchronized Counter Mode ................. 58
Operation in Timer Mode ........................................... 58
Oscillator .................................................................... 60
Oscillator Layout Considerations ............................... 60
Prescaler .................................................................... 61
Resetting Register Pair (TMR1H, TMR1L) ................. 61
Resetting Using a CCP Trigger Output ...................... 61
TMR1H ....................................................................... 59
TMR1L ....................................................................... 59
Use as a Real-Time Clock ......................................... 61
Timer2 ................................................................................ 63
Associated Registers ................................................. 64
Output ........................................................................ 63
Postscaler .................................................................. 63
Prescaler .................................................................... 63
Prescaler and Postscaler ........................................... 63
Timing Diagrams
A/D Conversion ........................................................ 140
Brown-out Reset ...................................................... 131
Capture/Compare/PWM (CCP1) .............................. 133
CLKO and I/O .......................................................... 130
External Clock .......................................................... 129
I²C Bus Data ............................................................ 137
I²C Bus Start/Stop Bits ............................................. 136
I²C Reception (7-Bit Address) .................................... 78
I²C Transmission (7-Bit Address) .............................. 78
PWM Output .............................................................. 68
Reset, Watchdog Timer, Oscillator Start-up
Timer and Power-up Timer .............................. 131
Slow Rise Time (MCLR Tied to Vdd
Through RC Network) ........................................ 96
SPI Master Mode ....................................................... 75
SPI Master Mode (CKE = 0, SMP = 0) .................... 134
SPI Master Mode (CKE = 1, SMP = 1) .................... 134
SPI Slave Mode (CKE = 0) ................................ 75, 135
SPI Slave Mode (CKE = 1) ................................ 75, 135
Time-out Sequence on Power-up (MCLR
Tied to Vdd Through Pull-up Resistor) ............... 95
Time-out Sequence on Power-up (MCLR
Tied to Vdd Through RC Network): Case 1 ....... 95
Time-out Sequence on Power-up (MCLR
Tied to Vdd Through RC Network): Case 2 ....... 95
Timer0 and Timer1 External Clock .......................... 132
Timer1 Incrementing Edge ......................................... 58
Wake-up from Sleep through Interrupt ..................... 100
Timing Parameter Symbology .......................................... 128
Timing Requirements
External Clock .......................................................... 129
TMR0 Register ................................................................... 15
TMR1CS Bit ....................................................................... 57
TMR1H Register ................................................................ 13
TMR1L Register ................................................................. 13
TMR1ON Bit ....................................................................... 57
TMR2 Register ................................................................... 13
TMR2ON Bit ....................................................................... 64
TOUTPS0 Bit ..................................................................... 64
TOUTPS1 Bit ..................................................................... 64
TOUTPS2 Bit ..................................................................... 64
TOUTPS3 Bit ..................................................................... 64
PIC16F818/819
TRISA Register .................................................................. 14
TRISB Register .............................................................14, 15
V
Vdd Pin ................................................................................ 8
Vss Pin ................................................................................. 8
W
Wake-up from Sleep .....................................................89, 99
Interrupts ..............................................................93, 94
MCLR Reset .............................................................. 94
WDT Reset ................................................................ 94
Wake-up Using Interrupts .................................................. 99
Watchdog Timer (WDT) ................................................89, 98
Associated Registers ................................................. 98
Enable (WDTEN Bit) .................................................. 98
INTRC Oscillator ........................................................ 98
Postscaler. See Postscaler, WDT.
Programming Considerations .................................... 98
Time-out Period ......................................................... 98
WDT Reset, Normal Operation ....................... 91, 93, 94
WDT Reset, Sleep ................................................91, 94
WDT Wake-up ........................................................... 93
WCOL ................................................................................ 73
Write Collision Detect Bit, WCOL ...................................... 73
WWW Address ................................................................ 173
WWW, On-Line Support ...................................................... 3
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DS39598F-page 171