Datasheet

 2001-2013 Microchip Technology Inc. DS39598F-page 171
PIC16F818/819
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
I
2
C Bus Data ............................................................137
I
2
C Bus Start/Stop Bits .............................................136
I
2
C Reception (7-Bit Address) ....................................78
I
2
C 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
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