CHAPTER 8 8-BIT TIMERS H0 AND H1
Preliminary User’s Manual U16315EJ1V0UD
201
Figure 8-13. Carrier Generator Mode Operation Timing (3/3)
(c) Operation when CMP11 is changed
8-bit timer H1
count clock
CMP01
TMHE1
INTTMH1
Carrier clock
00H 01H
N
00H 01H
01H
M
00H
N
00H
L
00H
<1>
<3>’
<4>
<3>
<2>
CMP11
<5>
M
N
L
M (L)
8-bit timer counter
H1 count value
<1>
When TMHE1 = 1 is set, 8-bit timer H1 starts a count operation. At that time, the carrier clock is held at the
inactive level.
<2>
When the count value of 8-bit timer counter H1 matches the CMP01 register value, 8-bit timer counter H1 is
cleared and the INTTMH1 signal is output.
<3>
The CMP11 register can be rewritten during 8-bit timer H1 operation, however, the changed value (L) is
latched. The CMP11 register is changed when the count value of 8-bit timer counter H1 and the CMP11
register value before the change (M) match (<3>’).
<4>
When the count value of 8-bit timer counter H1 and the CMP11 register value before the change (M) match,
the INTTMH1 signal is output, the carrier signal is inverted, and 8-bit timer counter H1 is cleared to 00H.
<5>
The timing at which the count value of 8-bit timer counter H1 and the CMP11 register value match again is
indicated by the value after the change (L).