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CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER
● 16-bit mode
To operate timer 0 as the counter function in the 16 bit mode, the function must be set as shown in Figure
8.7-3 .
Figure 8.7-3 Setting of Counter Function in 16-bit Mode
Counter function operation in the 16-bit mode is the same as interval timer function operation in the 16-bit
mode, except that the external clock is used instead of the internal clock.
Figure 8.7-4 shows counter function operation in 16-bit mode.
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
DDR3
0
TCCR CPIF
CFCLR
CPIEN CCMSK
TCMSK EDGS1
EDGS0 RESV
TCR1 TIF1
TFCR1
T1IEN
TCS12 TCS11
TCS10 TSTR1
TCR0 TIF0 TFCR0 T0IEN CINV TCS02 TCS01 TCS00 TSTR0
111
TCR2 PEN TSEL
TDR1
TDR0
TCPH
TCPL
: Used bit
: Unused bit
0 : Set "0"
1 : Set "1"
111
Setting of 00
Setting of the higher 8 bits of the counter value to be compared
Setting of the lower 8 bits of the counter value to be compared
Higher 8 bits of the number of detected events
Lower 8 bits of the number of detected events