upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 215

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

<1> When TMHE1 = 0 and TCE51 = 0, the 8-bit timer counter H1 operation is stopped.
<2> When TMHE1 = 1 is set, 8-bit timer counter H1 starts a count operation. At that time, the carrier clock
<3> When the count value of 8-bit timer counter H1 matches the CMP01 register value, the first INTTMH1 signal
<4> When the count value of 8-bit timer counter H1 matches the CMP11 register value, the INTTMH1 signal is
<5> When the INTTM51 signal is generated, it is synchronized with the 8-bit timer H1 count clock and is output as
<6> A carrier signal is output at the first rising edge of the carrier clock if NRZ1 is set to 1.
<7> When NRZ1 = 0, the TOH1 output is held at the high level and is not changed to low level while the carrier
remains default.
is generated, the carrier clock signal is inverted, and the compare register to be compared with 8-bit timer
counter H1 is switched from the CMP01 register to the CMP11 register. 8-bit timer counter H1 is cleared to
00H.
generated, the carrier clock signal is inverted, and the compare register to be compared with 8-bit timer
counter H1 is switched from the CMP11 register to the CMP01 register. 8-bit timer counter H1 is cleared to
00H. By performing procedures <3> and <4> repeatedly, a carrier clock with duty fixed to other than 50% is
generated.
the INTTM5H1 signal.
clock is high level (from <6> and <7>, the high-level width of the carrier clock waveform is guaranteed).
8-bit timer counter
TM51 count value
H1 count value
Carrier clock
8-bit timer H1
8-bit timer 51
Carrier clock
count clock
INTTM5H1
count clock
INTTMH1
INTTM51
TMHE1
CMP01
CMP11
NRZB1
TCE51
NRZ1
CR51
TOH1
Figure 8-13. Carrier Generator Mode Operation Timing (2/3)
<1><2>
00H
00H 01H
0
(b) Operation when CMP01 = N, CMP11 = M
Preliminary User’s Manual U19014EJ1V0UD
K
0
N 00H 01H
CHAPTER 8 8-BIT TIMER H1
<3>
K 00H 01H
1
<6>
<5>
1
M 00H
<4>
L
L 00H 01H
0
<7>
N
M
N 00H 01H
0
M 00H 01H
M
1
M 00H
1
N
0
00H 01H
N
N
00H
0
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