9.1.2
Block Diagram
Figure 9.1 shows a block diagram of one channel in the 8-bit timer module.
Internal
External
clock source
clock sources
Channel 0
øP/2
øP/8
øP/32
øP/64
øP/256
øP/1024
Channel 1
øP/2
øP/8
TMCI
øP/64
øP/128
øP/1024
øP/2048
Clock
Clock select
TCORA
Compare-match A
Comparator A
TCNT
TMO
TMRI
Internal
data bus
Overflow
Clear
Comparator B
TCORB
Control
logic
Compare-match B
TCSR
TCR
CMIA
CMIB
OVI
Interrupt signals
TCORA: Time constant register A (8 bits)
TCORB: Time constant register B (8 bits)
TCNT: Timer counter
TCSR: Timer control status register (8 bits)
TCR:
Timer control register (8 bits)
Figure 9.1 Block Diagram of 8-Bit Timer (1 Channel)
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