![](http://datasheet.mmic.net.cn/330000/MB90F568PF_datasheet_16437957/MB90F568PF_32.png)
MB90560/565 Series
32
2.
Timebase Timer
The timebase timer is an 18-bit freerun timer (timebase timer/counter) that counts up synchronized with the
main clock (oscillation clock : HCLK divided into 2) .
The timer can generate interrupt requests at a specified interval, with four different interval time settings
available.
The timer supplies the operating clock for peripheral functions including the oscillation stabilization delay timer
and watchdog timer.
Timebase timer interval settings
Internal Count Clock Period
Notes :
HCLK : Oscillation clock frequency
The values enclosed in ( ) indicate the times for a clock frequency of 4 MHz.
Period of clocks supplied from timebase timer
Peripheral Function
Notes :
HCLK : Oscillation clock frequency
The values enclosed in ( ) indicate the times for a clock frequency of 4 MHz.
Interval Time
2/HCLK (0.5
μ
s)
2
12
/HCLK (approx. 1.024 ms)
2
14
/HCLK (approx. 4.096 ms)
2
16
/HCLK (approx. 16.384 ms)
2
19
/HCLK (approx. 131.072 ms)
Clock Period
Oscillation stabilization delay for
the main clock
2
10
/HCLK (approx. 0.256 ms)
2
13
/HCLK (approx. 2.048 ms)
2
15
/HCLK (approx. 8.192 ms)
2
17
/HCLK (approx. 32.768 ms)
Watchdog timer
2
12
/HCLK (approx. 1.024 ms)
2
14
/HCLK (approx. 4.096 ms)
2
16
/HCLK (approx. 16.384 ms)
2
19
/HCLK (approx. 131.072 ms)