Datasheet

44
ATmega323(L)
1457E–11/01
8-bit Timers/Counters
T/C0 and T/C2
Figure 32 shows the block diagram for Timer/Counter0. Figure 33 shows the block dia-
gram for Timer/Counter2.
Figure 32. Timer/Counter0 Block Diagram
8-BIT DATA BUS
TIMER INT. FLAG
REGISTER (TIFR)
TIMER/COUNTER0
(TCNT0)
8-BIT COMPARATOR
OUTPUT COMPARE
REGISTER0 (OCR0)
TIMER INT. MASK
REGISTER (TIMSK)
0
0
0
7
7
7
T/C CLK SOURCE
UP/DOWN
T/C CLEAR
CONTROL
LOGIC
OCF2
ICF1
TOV2
OCF1B
OCF1A
TOV1
TOV0
OCF0
CK
T/C0 OVER-
FLOW IRQ
T/C0 COMPARE
MATCH IRQ
TOV0
OCF0
OCIE0
OCIE2
TOIE2
TICIE1
OCIE1B
OCIE1A
TOIE1
TOIE0
T/C0 CONTROL
REGISTER (TCCR0)
CS02
COM01
PWM0
CS01
COM00
CS00
CTC0
FOC0
PSR2
PSR10
SPECIAL FUNCTIONS
IO REGISTER (SFIOR)
T0