III PERIPHERAL BLOCK:
Control of Clock Output
When outputting an underflow signal of the
Timer 0 clock output control: PTOUT0 (D2) /
Timer 1 clock output control: PTOUT1 (D2) /
Timer 2 clock output control: PTOUT2 (D2) /
Timer 3 clock output control: PTOUT3 (D2) /
To output the underflow signal/clock, write "1" to PTOUTx. If an output pin has been set, the underflow signal is output from that pin.
The same applies when timer 2 or 3 has been set as the clock source of the serial interface. A clock generated from the underflow signal by dividing it by 2 is output to the serial interface through this control. The clock output is turned off by writing "0" to PTOUTx, and the external output is fixed at "0" and the internal clock output is fixed at "1".
Figure 3.3 shows the waveforms of the output signals.
Underflow signal
Underflow signal/2
PTOUTx
External output
T8UFx pin
Clock output
Figure 3.3
The underflow signal's pulse width (duration of the high period) is equal to that of the timer's input clock | ||
(prescaler's output). | ||
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1) After an initial reset (cold start), the ports | 8TM |
2)The port
3)The timer output is left as "0" when the timer output is turned on after setting the input clock and timer initial value.
4)When an underflow occurs after starting the timer, the port outputs a pulse with the same width as the
S1C33L03 FUNCTION PART | EPSON |