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HD6433636SW Folha de dados(PDF) 194 Page - Renesas Technology Corp

Nome de Peças HD6433636SW
Descrição Electrónicos  8-Bit Microcomputer
PDF  418 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433636SW Folha de dados(HTML) 194 Page - Renesas Technology Corp

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TCF Count Timing: TCF is incremented by each pulse of the input clock (internal clock or
external event).
• Internal clock
The settings of bits CKSH2 to CKSH0 or bits CKSL2 to CKSL0 in TCRF select one of four
internal clock signals (ø/32, ø/16, ø/4, or ø/2) divided from the system clock (ø).
• External event
External event input is selected by clearing bit CKSL2 to 0 in TCRF. Either rising or falling
edges of the clock input can be counted. The edge is selected by bit IEG3 in IEGR. An external
clock pulse width of at least two system clock cycles (ø) is necessary; otherwise the counter
will not operate properly.
TMOFH and TMOFL Output Timing: The outputs at pins TMOFH and TMOFL are the values
set in bits TOLH and TOLL in TCRF. When a compare match occurs, the output value is inverted.
Figure 9.5 shows the output timing.
ø
TMIF
(when IEG3 = 1)
Count input
clock
TCF
OCRF
Compare match
signal
TMOFH, TMOFL
N
N + 1
N
N + 1
NN
Figure 9.5 TMOFH, TMOFL Output Timing
TCF Clear Timing: TCF can be cleared at compare match with OCRF.
Timer Overflow Flag (OVF) Set Timing: OVF is set to 1 when TCF overflows (goes from
H'FFFF to H'0000).



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