APPENDIX D LIST OF CAUTIONS
User’s Manual U16899EJ2V0UD
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Chapter
Cl
assi
fi
cati
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Function Details
of
Function
Cautions Page
When TMHE0 = 1, setting the other bits of the TMHMD0 register is prohibited.
p. 204
Soft
TMHMD0: 8-bit
timer H mode
register 0
In the PWM output mode, be sure to set 8-bit timer H compare register 10
(CMP10) when starting the timer count operation (TMHE0 = 1) after the timer
count operation was stopped (TMHE0 = 0) (be sure to set again even if setting
the same value to CMP10).
p. 204
Hard
When the Ring-OSC clock is selected as the clock to be supplied to the CPU, the
clock of the Ring-OSC oscillator is divided and supplied as the count clock. If the
count clock is the Ring-OSC clock, the operation of 8-bit timer H1 is not
guaranteed (except when CKS12, CKS11, CKS10 = 1, 0, 1 (f
R
/2
7
)).
p. 206
When TMHE1 = 1, setting the other bits of the TMHMD1 register is prohibited.
p. 206
In the PWM output mode and carrier generator mode, be sure to set 8-bit timer H
compare register 11 (CMP11) when starting the timer count operation (TMHE1 =
1) after the timer count operation was stopped (TMHE1 = 0) (be sure to set again
even if setting the same value to CMP11).
p. 206
Soft
TMHMD1: 8-bit
timer H mode
register 1
When the carrier generator mode is used, set so that the count clock frequency of
TMH1 becomes more than 6 times the count clock frequency of TM51.
p. 206
Hard
In PWM output mode, three operation clocks (signal selected using the CKSn2 to
CKSn0 bits of the TMHMDn register) are required to transfer the CMP1n register
value after rewriting the register.
p. 212
Be sure to set the CMP1n register when starting the timer count operation
(TMHEn = 1) after the timer count operation was stopped (TMHEn = 0) (be sure
to set again even if setting the same value to the CMP1n register).
p. 212
PWM output
Make sure that the CMP1n register setting value (M) and CMP0n register setting
value (N) are within the following range.
00H
≤
CMP1n (M) < CMP0n (N)
≤
FFH
p. 213
Do not rewrite the NRZB1 bit again until at least the second clock after it has
been rewritten, or else the transfer from the NRZB1 bit to the NRZ1 bit is not
guaranteed.
p. 218
When 8-bit timer/event counter 51 is used in the carrier generator mode, an
interrupt is generated at the timing of <1>. When 8-bit timer/event counter 51 is
used in a mode other than the carrier generator mode, the timing of the interrupt
generation differs.
p. 218
Be sure to set the CMP11 register when starting the timer count operation
(TMHE1 = 1) after the timer count operation was stopped (TMHE1 = 0) (be sure
to set again even if setting the same value to the CMP11 register).
p. 220
Set so that the count clock frequency of TMH1 becomes more than 6 times the
count clock frequency of TM51.
p. 220
Set the values of the CMP01 and CMP11 registers in a range of 01H to FFH.
p. 220
In the carrier generator mode, three operating clocks (signal selected by CKS12
to CKS10 bits of TMHMD1 register) or more are required from when the CMP11
register value is changed to when the value is transferred to the register.
p. 220
Chapter 8
Soft
8-bit
timers H0,
H1
(TMH0,
TMH1)
Carrier
generator mode
(TMH1 only)
Be sure to set the RMC1 bit before the count operation is started.
p. 220