UPD78F0411GA-GAM-AX Datasheet, PDF (214/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
6.5 Special Use of TM00
6.5.1 Rewriting CR010 during TM00 operation
In principle, rewriting CR000 and CR010 of the 78K0/LC3 when they are used as compare registers is prohibited
while TM00 is operating (TMC003 and TMC002 = other than 00).
However, the value of CR010 can be changed, even while TM00 is operating, using the following procedure if
CR010 is used for PPG output and the duty factor is changed (when setting CR010 to a smaller or larger value than
the current value, rewrite the CR010 value immediately after a match between CR010 and TM00 or between CR000
and TM00. When CR010 is rewritten immediately before a match between CR010 and TM00 or between CR000 and
TM00, an unexpected operation may be performed).
Procedure for changing value of CR010
<1> Disable interrupt INTTM010 (TMMK010 = 1).
<2> Disable reversal of the timer output when the value of TM00 matches that of CR010 (TOC004 = 0).
<3> Change the value of CR010.
<4> Wait for one cycle of the count clock of TM00.
<5> Enable reversal of the timer output when the value of TM00 matches that of CR010 (TOC004 = 1).
<6> Clear the interrupt flag of INTTM010 (TMIF010 = 0) to 0.
<7> Enable interrupt INTTM010 (TMMK010 = 0).
Remark For TMIF010 and TMMK010, see CHAPTER 17 INTERRUPT FUNCTIONS.
6.5.2 Setting LVS00 and LVR00
(1) Usage of LVS00 and LVR00
LVS00 and LVR00 are used to set the default value of the TO00 output and to invert the timer output without
enabling the timer operation (TMC003 and TMC002 = 00). Clear LVS00 and LVR00 to 00 (default value: low-
level output) when software control is unnecessary.
LVS00
0
0
1
1
LVR00
0
1
0
1
Timer Output Status
Not changed (low-level output)
Cleared (low-level output)
Set (high-level output)
Setting prohibited
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User’s Manual U18698EJ1V0UD