Table 18.4D Count Clock And Period - Fujitsu F2MC-16LX MB90580 Series Hardware Manual
16-bit microcontrollers
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Also See for F2MC-16LX MB90580 Series:
- Hardware manual (706 pages) ,
- Application note (13 pages) ,
- Operation manual (10 pages)
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18.4 Operations
(e) Timer Period
If the timer is started in single-shot mode after setting 0000
counts and the count stops. The following formula calculates the time from the timer starting to the timer
stopping.
T
= (65536 -n
1
If the timer is started in reload mode after setting 0000
counts. The following formulas calculate the reload period and the period of the POT pin output pulse.
T
= (65536 -n
R
T
= T
POUT
(f) Count Clock and Maximum Period
For timer mode, the maximum period is when 0000
The following table lists the count clock period and maximum timer period for a 16MHz machine cycle
(indicated by φ below).
Count Clock Selection
Count clock period
Maximum timer period
258
Chapter 18: Pulse Width Counter (PWC) Timer
T
... Time from start to stop (µs)
1
) × t
n
... Timer value set in PWCR when the timer starts
1
1
t
... Count clock period (µs)
T
... Reload period (overflow period) (µs)
R
) × t
T
...Period of the POT pin output pulse (µs)
R
POUT
× 2
n
... Reload value stored in PWCR
R
R
t
... Count clock period (µs)
Table 18.4d Count Clock and Period
CKS1, 0 = 00 (φ/4)
0.25µs
16.38ms
to PWCR, the timer overflows after 65536
H
to PWCR, the timer overflows after each 65536
H
is set to PWCR.
H
CKS1, 0 = 01 (φ/16)
1µs
65.5ms
CKS1, 0 = 10 (φ/32)
2µs
131.1ms
MB90580 Series
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