PIC18F25K80 MICROCHIP [Microchip Technology], PIC18F25K80 Datasheet - Page 240

• Manufacturer Part Number: PIC18F25K80
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F66K80 FAMILY
17.2
The Timer4 module has an eight-bit Period register,
PR4, that is both readable and writable. Timer4 incre-
ment from 00h until it matches PR4 and then resets to
00h on the next increment cycle. The PR4 register is
initialized to FFh upon Reset.
FIGURE 17-1:
TABLE 17-1:
DS39977C-page 240
INTCON
IPR4
PIR4
PIE4
TMR4
T4CON
PR4
PMD1
Legend: — = unimplemented, read as ‘ 0 ’. Shaded cells are not used by the Timer4 module.
Name
T4OUTPS<3:0>
T4CKPS<1:0>
F
OSC
Timer4 Interrupt
/4
Timer4 Register
Timer4 Period Register
GIE/GIEH
TMR4IP
TMR4IF
TMR4IE
PSPMD
Bit 7
REGISTERS ASSOCIATED WITH TIMER4 AS A TIMER/COUNTER
—
TIMER4 BLOCK DIAGRAM
T4OUTPS3 T4OUTPS2 T4OUTPS1 T4OUTPS0
PEIE/GIEL
CTMUMD
Internal Data Bus
1:1, 1:4, 1:16
2
Prescaler
EEIP
EEIE
Bit 6
EEIF
TMR0IE
CMP2IP
CMP2IF
CMP2IE
ADCMD
Bit 5
4
TMR4
Preliminary
Reset
8
TMR4MD
CMP1IP
CMP1IF
CMP1IE
INT0IE
Bit 4
17.3
The outputs of TMR4 (before the postscaler) are used
only as a PWM time base for the ECCP modules. They
are not used as baud rate clocks for the MSSP module
as is the Timer2 output.
Comparator
1:1 to 1:16
Postscaler
TMR3MD
RBIE
Bit 3
Output of TMR4
—
—
—
TMRx/PRx
Match
8
TMR4ON
TMR2MD
TMR0IF
CCP5IP
CCP5IE
CCP5IF
Bit 2
 2011 Microchip Technology Inc.
PR4
T4CKPS1 T4CKPS0
TMR1MD
8
CCP4IP
CCP4IF
CCP4IE
INT0IF
Bit 1
TMR4 Output
(to PWM)
Set TMR4IF
TMR0MD
CCP3IP
CCP3IF
CCP3IE
RBIF
Bit 0