Manualshelf

Datasheet

ManualsBrandsRENESAS ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 16 8-Bit 10 MHz I/O number 9
361362363364365366367368369370
78K0/Ix2 CHAPTER 9 8-BIT TIMER H1
R01UH0010EJ0500 Rev.5.00 355
Feb 28, 2012
Figure 9-15. Carrier Generator Mode Operation Timing (2/3)
(b) Operation when CMP01 = N, CMP11 = M
N
CMP01
CMP11
TMHE1
INTTMH1
Carrier clock
TM51 count value
00H N 00H 01H M 00H N 00H 01H M 00H 00HN
M
TCE51
TOH1
0
0
1
1
0
0
1
1
0
0
INTTM51
NRZB1
NRZ1
Carrier clock
00H 01H K 00H 01H L 00H 01H M 00H 01H 00H 01HN
INTTM5H1
<1><2>
<3>
<4>
<5>
<6>
<7>
8-bit timer 51
count clock
8-bit timer H1
count clock
8-bit timer counter
H1 count value
K
CR51
L
M
N
<1> When TMHE1 = 0 and TCE51 = 0, the 8-bit timer counter H1 operation is stopped.
<2> When TMHE1 = 1 is set, the 8-bit timer counter H1 starts a count operation. At that time, the carrier clock
remains default.
<3> When the count value of the 8-bit timer counter H1 matches the CMP01 register value, the first INTTMH1 signal
is generated, the carrier clock signal is inverted, and the compare register to be compared with the 8-bit timer
counter H1 is switched from the CMP01 register to the CMP11 register. The 8-bit timer counter H1 is cleared to
00H.
<4> When the count value of the 8-bit timer counter H1 matches the CMP11 register value, the INTTMH1 signal is
generated, the carrier clock signal is inverted, and the compare register to be compared with the 8-bit timer
counter H1 is switched from the CMP11 register to the CMP01 register. The 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.
<5> When the INTTM51 signal is generated, it is synchronized with the 8-bit timer H1 count clock and is output as the
INTTM5H1 signal.
<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 clock
is high level (from <6> and <7>, the high-level width of the carrier clock waveform is guaranteed).
Remark INTTM5H1 is an internal signal and not an interrupt source.