Fujitsu FR60 7.1 What are the types of the internal clock, and how do I select?, 7.2 How do I select the external clock?, 7.3 How do I enable / disable the count operation of the free-run timer?

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Chapter 35 Free-Run Timer
7.Q & A
7. Q & A
7.1 What are the types of the internal clock, and how do I select?
There are 4 types of internal clocks, and these are set by the clock selection bit (TCCS.ECLK) and the count
clock bit (TCCS.CLK [1:0]).
7.2 How do I select the external clock?
Set with clock selection bits (TCCS.ECLK), data direction bits, and (extra) port function bits.
7.3 How do I enable / disable the count operation of the free-run timer?
Set with count operation bits (TCCS.STOP).
Internal clock
Setting Count period
Clock selection
Bit (ECLK) Count clock bit (CLK [1:0])
FCLKP =
32MHz FCLKP = 16MHz
To select FCLKP/4 Set to “0” Sets to “00” 125 ns 250 ns
To select FCLKP/16 Set to “0” Set to “01” 0.5µs1µs
To select FCLKP/32 Set to “0” Set to “10” 1µs2µs
To select FCLKP/64 Set to “0” Set to “11” 2µs4µs
To use the external
clock input Setting Pins Count Cycle
Free-run Timer 0-7 The clock
selection
bit (ECLK)
to “1”
Theport function bit
(PFRxy.z)
to “1”
The extra port
function bit
(EPFRxy.z}
to “1”
CK0-
CK7 Over 2/FCLKP
Operation Count operation bit (STOP)
To enable the free-run timer Set to “0”
To stop the free-run timer Set to “1”