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H8S/2218 Scheda tecnica(PDF) 378 Page - Renesas Technology Corp

Il numero della parte H8S/2218
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  750 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2218 Scheda tecnica(HTML) 378 Page - Renesas Technology Corp

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Section 9 16-Bit Timer Pulse Unit (TPU)
Rev.6.00 Jun. 03, 2008 Page 330 of 698
REJ09B0074-0600
Status Flag Clearing Timing: After a status flag is read as 1 by the CPU, it is cleared by writing
0 to it. When the DMAC is activated, the flag is cleared automatically. Figure 9.42 shows the
timing for status flag clearing by the CPU, and figure 9.43 shows the timing for status flag clearing
by the DMAC.
T
1
T
2
TSR write cycle
TSR address
φ
Address
Write signal
Status flag
Interrupt
request
signal
Figure 9.42 Timing for Status Flag Clearing by CPU
Interrupt
request
signal
Status flag
Address
Source address
DMAC
read cycle
T
1
T
2
Destination
address
T
1
T
2
DMAC
write cycle
φ
Figure 9.43 Timing for Status Flag Clearing by DMAC Activation



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