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MB90335 Series
13.3.3
Count Clock Selection and Operation Mode Selection
Count clock selection and operation mode selection are described.
■ Count Clock Selection
Timer count clock can be selected from three types of internal clock sources by setting the PWCSR bit7
(CKS1) and bit6 (CKS0).
Table 13.3-1 shows the count clock selection contents.
Table 13.3-1 Count Clock Selection Contents
bit7,bit6:CKS1,CKS0
• 4-division clock of machine clock is selected for the initial value after the reset.
Note:
Select the count clock always before starting the timer.
CM44-10137-6E
PWCSR/
4-division of Machine clock
00
B
(0.17μs in case of machine clock of 24 MHz) [Initial value]
16-division of Machine clock
01
B
(0.67μs in case of machine clock of 24 MHz)
32-division of Machine clock
10
B
(1.33μs in case of machine clock of 24 MHz)
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 13 PWC TIMER
13.3 Movement of PWC Timer
Selected internal count clock
303
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