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454
CHAPTER 16 PWC Timer
■
Timer Period
If the timer is started in one-shot mode after "0000
H
" is set in PWC0/PWC1, a timer overflow occurs and
the count is discontinued if the count exceeds 65536. The following formula is used to calculate the time
from start to stop of the timer.
If the timer is started after "0000
H
" is set in PWC0/PWC1, a timer overflow occurs every time the count
exceeds 65536. The following formula is used to calculate the reload period and the PWO pin output pulse
period.
■
Count Clock and Maximum Period
In timer mode, when "0000
H
" is set in PWC0/PWC1, the maximum period results.
Table 16.6-4 lists the count clock period and maximum timer period corresponding to the machine cycle
(indicated by f in the table) at 16 MHz
T
1
= (65536-n
1
) x t
T
1
Time from start to stop (
µ
s)
......
n
1
Timer value set in PWC0/PWC1 when the timer is started
......
......
t
Count clock period (
µ
s)
T
R
= (65536-N
R
) x t
T
R
Reload period (overflow period) (
µ
s)
............
T
POUT
PWO0/PWO1 pin output pulse period (
µ
s)
......
N
R
Reload value stored in PWC0/PWC1
..........
t
Time from start to stop (
µ
s)
..............
Table 16.6-4 Count Clock and Period
Count clock selection
When CKS1,CKS0=00
B
(
φ
/4)
When CKS1,CKS0=01
B
(
φ
/16)
When CKS1,CKS0=10
B
(
φ
/32)
Count clock period
0.25
µ
s
1
µ
s
2
µ
s
Maximum timer period
16.38 ms
65.5 ms
131.1 ms
Содержание MB90460 Series
Страница 1: ...The following document contains information on Cypress products ...
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Страница 9: ...iv ...
Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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