Toshiba H1 Series - Manual (Page 314)

TMP92CZ26A
92CZ26A-311
(4) Application examples of capture function
Used capture function, they can be applied in many ways, for example;
1. One-shot pulse output from external trigger pulse
2. Frequency
measurement
3. Pulse width measurement
1. One-shot pulse output from external trigger pulse
Set the up counter UC10 in free-running mode with the internal input clock,
input the external trigger pulse from TB0IN0 pin, and load the value of up
counter into capture register TB0CP0H/L at the rising edge of the TB0IN0 pin.
When the interrupt INT6 is generated at the rising edge of TB0IN0 input, set
the TB0CP0H/L value (c) plus a delay time (d) to TB0RG0H/L (=c+d), and set the
above set value (c+d) plus a one-shot pulse width (p) to TB0RG1H/L (=c+d+p).
The TB0FFCR<TB0E1T1, TB0E0T1> register should be set “11” and that the
TB0FF0 inversion is enabled only when the up counter value matches
TB0RG0H/L or TB0RG1H/L. When interrupt INTTB01 occurs, this inversion will
be disabled after one-shot pulse is output.
The (c), (d) and (p) correspond to c, d, and p in the Figure 3.13.12.
Figure 3.13.12 One-shot Pulse Output (with delay)
Timer output pin TB0OUT0
c
+ d + p
c
+ d c
Disable inversion
caused by loading into
TB0CP0H/L
Inversion
enable
(p) (d)
Pulse width Delay time
Inversion
enable
INTTB01 occured
Load to capture registesr 0 (TB0CP0H/L)
INT6 occured
Count clock
(Prescaler output clock)
Set the counter in free-running mode.
TB0IN0 pin input
(External trigger pulse)
Match with TB0RG0H/L
Match with TB0RG1H/L