M16C26 Datasheet, PDF (99/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Timer B
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change. _{M16C/26 Group}
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
When measuring measurement pulse time interval from falling edge to falling edge
Count source
Measurement pulse
H
L
Reload register counter
transfer timing
Timing at which counter
reaches 000016
1
Count start flag
0
Transfer
(indeterminate value)
Transfer
(measured value)
(Note 1)
(Note 1)
(Note 2)
Timer Bi interrupt
1
request bit
0
Timer Bi overflow flag ¹
0
Cleared to 0 when interrupt request is accepted, or cleared by software.
Note 1: Counter is initialized at completion of measurement.
Note 2: Timer has overflowed.
Figure 1.13.22. Operation timing when measuring a pulse period
Count source
H
Measurement pulse
L
Reload register counter
transfer timing
Timing at which counter
reaches 000016
Transfer
(indeterminate
value)
Transfer
(measured value)
Transfer
(measured
value)
Transfer
(measured value)
(Note 1)
(Note 1)
(Note 1) (Note 1)
(Note 2)
Count start flag
1
0
Timer Bi interrupt
1
request bit
0
Timer Bi overflow flag ¹
0
Cleared to 0 when interrupt request is accepted, or cleared by software.
Note 1: Counter is initialized at completion of measurement.
Note 2: Timer has overflowed.
Figure 1.13.23. Operation timing when measuring a pulse width
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