Overview Of Timebase Timer - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 9 TIMEBASE TIMER
9.1

Overview of Timebase Timer

The timebase timer has an interval timer function that enables a selection of four
interval times using 18-bit free-run counter (timebase counter) count-up with
synchronizing to the internal count clock (2 division of original oscillation).
Furthermore, the function of timer output of oscillation stabilization wait time or
function supplying operation clocks for watchdog timer are provided.
Interval Timer Function
The interval timer function generates interrupt requests at regular intervals.
• An overflow of the bit for the interval timer in the timebase counter generates an interrupt request.
• You can select one of four bits (interval time) for the interval timer.
Table 9.1-1 shows the interval time of the timebase timer.
Table 9.1-1 Interval Time of Timebase Timer
Internal count clock cycle
2/HCLK(0.33 µs)
HCLK: Oscillation clock
The value in parentheses is applicable when the oscillation clock operates at 6 MHz.
206
Time of interval
12
2 /HCLK (Approx. 0.68 ms)
14
2 /HCLK (Approx. 2.7 ms)
16
2 /HCLK (Approx. 10.9 ms)
19
2 /HCLK (Approx. 87.4 ms)