CHAPTER 7 8-BIT TIMER H1
User’s Manual U18172EJ2V0UD
126
Figure 7-4. Format of 8-Bit Timer H Mode Register 1 (TMHMD1)
TMHE1
Stop timer count operation (counter is cleared to 0)
Enable timer count operation (count operation started by inputting clock)
TMHE1
0
1
Timer operation enable
TMHMD1
Symbol
CKS12
CKS11
CKS10
TMMD11 TMMD10 TOLEV1
TOEN1
Address: FF70H After reset: 00H R/W
f
XP
f
XP
/2
2
f
XP
/2
4
f
XP
/2
6
f
XP
/2
12
f
RL
/2
7
CKS12
0
0
0
0
1
1
CKS11
0
0
1
1
0
0
CKS10
0
1
0
1
0
1
(10 MHz)
(2.5 MHz)
(625 kHz)
(156.25 kHz)
(2.44 kHz)
(1.88 kHz (TYP.))
Count clock (f
CNT
) selection
Setting prohibited
Other than above
Interval timer mode
PWM output mode
Setting prohibited
TMMD11
0
1
TMMD10
0
0
Timer operation mode
Low level
High level
TOLEV1
0
1
Timer output level control (in default mode)
Disable output
Enable output
TOEN1
0
1
Timer output control
Other than above
<7>
6
5
4
3
2
<1>
<0>
Cautions 1. When TMHE1 = 1, setting the other bits of the TMHMD1 register is prohibited.
2. In the PWM output 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 the CMP11 register).
Remarks 1.
f
XP
: Oscillation frequency of clock to peripheral hardware
2.
f
RL
: Low-speed internal oscillation clock oscillation frequency
3.
Figures in parentheses apply to operation at f
XP
= 10 MHz, f
RL
= 240 kHz (TYP.).