HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 243

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Single-Shot Output with Arbitrary Pulse Width and Delay from TRGV Input: The trigger
function can be used to output a pulse with an arbitrary pulse width at an arbitrary delay from the
TRGV input, as shown in figure 9.12. To set up this output:
After these settings, a pulse waveform will be output without further software intervention, with a
delay determined by TCORA from the TRGV input, and a pulse width determined by (TCORB –
TCORA).
H'FF
TCORB
TCORA
H'00
TRGV
TMOV
Set bit CCLR1 to 1 and clear bit CCLR0 to 0 in TCRV0 so that TCNTV will be cleared by
compare match with TCORB.
Set bits OS3 to OS0 to 0110 in TCSRV so that the output will go to 1 at compare match with
TCORA and to 0 at compare match with TCORB.
Set bits TVEG1 and TVEG0 to 10 in TCRV1 and set TRGE to 1 to select the falling edge of
the TRGV input.
Set bits CKS2 to CKS0 in TCRV0 and bit ICKS0 in TCRV1 to select the desired clock source.
Compare match A
Figure 9.12 Pulse Output Synchronized to TRGV Input
TCNTV
Compare match B
clears TCNTV and
halts count-up
Counter cleared
Compare match A
Compare match B
clears TCNTV and
halts count-up
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