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H8/3028F 数据表(PDF) 389 Page - Renesas Technology Corp

部件名 H8/3028F
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8/3028F 数据表(HTML) 389 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 359 of 890
Timing of Setting of Overflow Flag (OVF): OVF is set to 1 when 16TCNT overflows from
H'FFFF to H'0000 or underflows from H'0000 to H'FFFF. Figure 9.35 shows the timing.
Overflow
signal
16TCNT
φ
OVF
OVI
Figure 9.35 Timing of Setting of OVF
9.5.2
Timing of Clearing of Status Flags
If the CPU reads a status flag while it is set to 1, then writes 0 in the status flag, the status flag is
cleared. Figure 9.36 shows the timing.
φ
Address
IMF, OVF
TISR write cycle
TISR address
T1
T2
T3
Figure 9.36 Timing of Clearing of Status Flags



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