PIC18F8720 Datasheet, PDF (9/12 Pages) Microchip Technology – Rev. A4 Silicon/Data Sheet Errata

PIC18F8720/8620/6720/6620
10. Module: Timer0 Block Diagram in 8-Bit
and 16-Bit Modes
The PSA multiplexor bit values in Figures 11-1 and
11-2 do not match the text description of the
Timer0 PSA bit in the T0CON register.
The bit values have been corrected by swapping
the values as shown below (correct values are
shown in bold text):
FIGURE 11-1:
TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
FOSC/4
RA4/T0CKI pin
T0SE
0
1
1
Programmable
0
Prescaler
3
T0PS2, T0PS1, T0PS0
T0CS
PSA
Sync with
Internal
Clocks
(2 TCY Delay)
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
Data Bus
8
TMR0
Set Interrupt
Flag bit TMR0IF
on Overflow
FIGURE 11-2:
TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
FOSC/4
RA4/T0CKI
pin
T0SE
0
1
1
Programmable 0
Prescaler
3
PSA
T0PS2, T0PS1, T0PS0
T0CS
Sync with
Internal
Clocks
(2 TCY Delay)
TMR0L
8
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
TMR0
High Byte
8
Set Interrupt
Flag bit TMR0IF
on Overflow
8
TMR0H
Read TMR0L
Write TMR0L
8
Data Bus<7:0>
© 2005 Microchip Technology Inc.
DS80172C-page 9