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H8S2245 Scheda tecnica(PDF) 419 Page - Renesas Technology Corp

Il numero della parte H8S2245
Spiegazioni elettronici  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S2245 Scheda tecnica(HTML) 419 Page - Renesas Technology Corp

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Section 10 8-Bit Timers
Rev.3.00 Mar. 26, 2007 Page 377 of 772
REJ09B0355-0300
10.3.3
Timing of External RESET on TCNT
TCNT is cleared at the rising edge of an external reset input, depending on the settings of the
CCLR1 and CCLR0 bits in TCR. The clear pulse width must be at least 1.5 states. Figure 10.7
shows the timing of this operation.
φ
Clear signal
External reset
input pin
TCNT
N
H'00
N–1
Figure 10.7 Timing of External Reset
10.3.4
Timing of Overflow Flag (OVF) Setting
The OVF in TCSR is set to 1 when the timer count overflows (changes from H'FF to H'00). Figure
10.8 shows the timing of this operation.
φ
OVF
Overflow signal
TCNT
H'FF
H'00
Figure 10.8 Timing of OVF Setting



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