Samsung S3F401F - Manual (Page 229)

S3F401F_UM_REV1.00 TIMER
11-5
2.3 CAPTURE MODE OPERATION
In capture mode, the timer can perform the capturing operation, which is that the counter value is transferred into the
capture register (Timer Data Register) in synchronization with an external trigger. The external triggering signal for
capturing operation is a pre-defined valid edge on the capture input pin. When this valid signal happens, the counter
value in process should be moved into the capture register (Timer Data Register). By using the capturing function,
you can measure the time difference between external events. If a valid trigger signal on the pin does not happen
before the overflow, an overflow interrupt will be generated and the counter value will be counted from 0x0000,
again.
TDAT.15-.0: DATA
Timer Data Register
TCON.5-.3: OMS
Clear
Overflow
TCLK
TnCAP
TCON.6: CL
INT_TOFn
INT_TMCn
INTMASK
INTPND
TCNT.15-.0: CNT
16-bit Counter
INTMASK
INTPND
Match
Figure 11-4. Simplified Timer Function Diagram: Capture Mode