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CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER
8.2 Configuration of 8/16-bit Capture Timer/Counter
The 8/16-bit capture timer/counter consists of the following seven blocks:
• Count clock selectors 0/1
• Counter circuits 0/1
• Square wave output control circuit
• Timer 0/1 data registers (TDR0, TDR1)
• Timer 0/1 control registers (TCR0, TCR1)
• Capture data registers (TCPL, TCPH)
• Timer output control register (TCR2)
■ Block Diagram of 8/16-bit Capture Timer/Counter
Figure 8.2-1 Block Diagram of 8/16-bit Capture Timer/Counter
Counter clear
mask (capture clr)
Counter clear mask (identity clr)
Counter clear
Capture latch
Internal data bus
8-bit mode
Port output enable
Timer0, Timer1
output selection
CK0
TDR0
TDR1
TIF0TFCR0T0IENCINVTCS02
TCS01TCS00
TSTR0
TIF1TFCR1
T1IEN
TCS12TCS11TCS10TSTR
1
CK6
to
to
CO
CK
EQ
CLR
Q
TFF
EQ
CLR
CK
CK6
CK0
3
3
CPIF
CFCLR
CPIEN
CCMSK
TCMSK
EDGS1
EDGS0
RESV
TCR0
TCCR
TCPL
TCR1
TCPH
P34/TO/
INT10
P33/EC
TSEL
PEN
TCR2
M
P
X
M
P
X
IRQ3
IRQ4
8-bit counter "L"
Comparator
LOAD comparator latch
Data register "L"
Pin
Pin
Capture register
"L"
Capture register
"H"
Data register "H"
8-bit counter "H"
Comparator
LOAD comparator latch