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10.1.2. Block Diagram
Figure 10-1 shows a block diagram of one free-running timer channel.
External clock
FTCI
Clock select
FTOA
FTOB
FTI
OCRA:
Output Compare Register A
OCRB:
Output Compare Register B
FRC:
Free Running Counter
ICR:
Input Capture Register
TCSR:
Timer Control/Status Register
TCR:
Timer Control Register
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Internal clock
ø/4
ø/8
ø/32
Clock
Compare-match A
Overflow
Clear
Compare-match B
Control
logic
Capture
ICI
OCIA
OCIB
FOVI
Interrupt signals
Figure 10-1 Block Diagram of 16-Bit Free-Running Timer
OCRA
Comparator A
FRC
Comparator B
OCRB
ICR
TCSR
TCR
178
Internal
data bus
Module
data
bus
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