PIC12F1516 MICROCHIP [Microchip Technology], PIC12F1516 Datasheet - Page 155

• Manufacturer Part Number: PIC12F1516
• Description: 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

17.0
The Timer0 module is an 8-bit timer/counter with the
following features:
• 8-bit timer/counter register (TMR0)
• 8-bit prescaler (independent of Watchdog Timer)
• Programmable internal or external clock source
• Programmable external clock edge selection
• Interrupt on overflow
• TMR0 can be used to gate Timer1
Figure 17-1
17.1
The Timer0 module can be used as either an 8-bit timer
or an 8-bit counter.
17.1.1
The Timer0 module will increment every instruction
cycle, if used without a prescaler. 8-Bit Timer mode is
selected by clearing the TMR0CS bit of the
OPTION_REG register.
When TMR0 is written, the increment is inhibited for
two instruction cycles immediately following the write.
FIGURE 17-1:
 2011 Microchip Technology Inc.
Note:
T0CKI
F
OSC
TIMER0 MODULE
Timer0 Operation
/4
8-BIT TIMER MODE
The value written to the TMR0 register
can be adjusted, in order to account for
the two instruction cycle delay when
TMR0 is written.
is a block diagram of the Timer0 module.
TMR0SE
BLOCK DIAGRAM OF THE TIMER0
TMR0CS
0
1
Preliminary
Prescaler
8-bit
8
PS<2:0>
17.1.2
In 8-Bit Counter mode, the Timer0 module will increment
on either the rising or falling edge of the T0CKI pin. The
edge that increments the counter is determined by the
TMR0SE bit in the OPTION_REG register. TMR0SE = 1
selects the falling edge.
The 8-Bit Counter mode using the T0CKI pin is selected
by setting the TMR0CS bit in the OPTION_REG register
to ‘1’.
PIC16(L)F1516/7/8/9
8-BIT COUNTER MODE
PSA
1
0
2 T
Sync
CY
Set Flag bit TMR0IF
DS41452B-page 155
Overflow to Timer1
on Overflow
Data Bus
8
TMR0