Operation Of Counter Functions; Counter Function Operation - Fujitsu F2MC-8L F202RA Hardware Manual

8.7

Operation of Counter Functions

This section describes the operation of the 8/16-bit capture timer/counter function.
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Counter Function Operation

● 8-bit mode
To operate timer 0 as the counter function in the 8-bit mode, the function must be set as shown in Figure
8.7-1 .
DDR3
TCCR
TCR1
TCR0
TCR2
TCDL
TDR0
0
1
Counter function operation in the 8-bit mode is the same as interval timer function (timer 0 in
8-bit mode) operation except that the external clock is used instead of the internal clock.
The number of events can be known by reading the capture data register (TCPL). A specific number of
events can be known by the event count detection function.
Figure 8.7-1 Setting of Counter Function in 8-bit Mode
bit7 bit6 bit5
CPIF CFCLR CPIEN CCMSK TCMSK EDGS1 EDGS0 RESV
TFCR1 T1IEN
TIF1
TIF0 TFCR0 T0IEN
Setting of the counter value to be compared
: Used bit
: Unused bit
: Set "0"
: Set "1"
CHAPTER 8 8/16-BIT CAPTURE TIMER/COUNTER
bit4 bit3 bit2
0
Setting of 00
TCS12 TCS11 TCS10 TSTR1
Setting of a value
other than 111
CINV TCS02 TCS01 TCS00 TSTR0
1
Number of detected events
bit1 bit0
1 1
PEN TSEL
189