Datasheet

78K0/Kx2-L CHAPTER 8 8-BIT TIMERS H0 AND H1
R01UH0028EJ0400 Rev.4.00 343
Sep 27, 2010
Cautions 1. When TMHE1 = 1, setting the other bits of TMHMD1 is prohibited. However, TMHMD1 can be
refreshed (the same value is written).
2. In the PWM output mode and carrier generator mode, be sure to set the 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).
3. 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.
4. In the 78K0/KB2-L and 78K0/KC2-L, the actual TOH1/INTP5/P16 pin output is determined
depending on PM16 and P16, besides TOH1 output.
5. In the 78K0/KY2-L and 78K0/KA2-L (20-pin products), the actual TOH1/TI51/INTP1/P30 pin output
is determined depending on PM30 and P30, besides TOH1 output.
Remarks 1. f
PRS: Peripheral hardware clock frequency
2. f
IL: Internal low-speed oscillation clock frequency
(2) 8-bit timer H carrier control register 1 (TMCYC1)
This register controls the remote control output and carrier pulse output status of 8-bit timer H1.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Figure 8-7. Format of 8-Bit Timer H Carrier Control Register 1 (TMCYC1)
0TMCYC1 0 0 0 0 RMC1 NRZB1 NRZ1
Address: FF6DH After reset: 00H R/W
Note
Low-level output
High-level output at rising edge of INTTM51 signal input
Low-level output
Carrier pulse output at rising edge of INTTM51 signal input
RMC1
0
0
1
1
NRZB1
0
1
0
1
Remote control output
Carrier output disabled status (low-level status)
Carrier output enabled status
(RMC1 = 1: Carrier pulse output, RMC1 = 0: High-level status)
NRZ1
0
1
Carrier pulse output status flag
<0>
Note Bit 0 is read-only.
Caution Do not rewrite RMC1 when TMHE = 1. However, TMCYC1 can be refreshed (the same value is
written).