TIMER B
8.5 Pulse period/pulse width measurement mode
Figures 8.5.4 and 8.5.5 show the operation examples during the pulse period measurement; Figures 8.5.6
and 8.5.7 show the operation examples during the pulse width measurement.
Count source
Measurement pulse
FFFF16
Undefined
value
000016
Time
Transferred
(undefined value)
Transferred
(measured value)
Reload register
Counter
Transfer timing
✕
✕
✕
Timing at which counter is
cleared to “000016
”
Count start bit
Timer Bi interrupt
request bit
Cleared to “0” when interrupt request is accepted or
cleared to “0” by software.
Undefined
Timer Bi overflow flag
Cleared to “0” by software.
✕ Counter is initialized by completion of measurement.
✕ Counter overflows.
✕The above applies when measurement is performed for an interval from one falling edge to the next
falling edge of the measurement pulse.
Fig. 8.5.4 Operation examples during pulse period measurement (when counter clear type is selected)
7906 Group User’s Manual Rev.2.0
8-25
RENESAS [ RENESAS TECHNOLOGY CORP ]
