UPD78F9234MC-5A4-A Datasheet, PDF (142/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 8 8-BIT TIMER H1
Figure 8-4. Format of 8-bit Timer H Mode Register 1 (TMHMD1)
Address: FF70H After reset: 00H R/W
Symbol
TMHMD1
<7>
6
5
4
3
2
<1>
<0>
TMHE1 CKS12 CKS11 CKS10 TMMD11 TMMD10 TOLEV1 TOEN1
TMHE1
Timer operation enable
0 Stop timer count operation (counter is cleared to 0)
1 Enable timer count operation (count operation started by inputting clock)
CKS12 CKS11 CKS10
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
Other than above
Count clock (fCNT) selection
fXP
(10 MHz)
fXP/2² (2.5 MHz)
fXP/2⁴ (625 kHz)
fXP/2⁶ (156.25 kHz)
fXP/2¹² (2.44 kHz)
fRL/2⁷ (1.88 kHz (TYP.))
Setting prohibited
TMMD11 TMMD10
Timer operation mode
0
0 Interval timer mode
1
0 PWM output mode
Other than above Setting prohibited
TOLEV1
0 Low level
1 High level
Timer output level control (in default mode)
TOEN1
0 Disable output
1 Enable output
Timer output control
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. fXP: Oscillation frequency of clock to peripheral hardware
2. fRL: Low-speed internal oscillation clock frequency
3. Figures in parentheses apply to operation at fXP = 10 MHz, fRL = 240 kHz (TYP.).
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User’s Manual U17446EJ5V0UD