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H8S/2214 数据表(PDF) 486 Page - Renesas Technology Corp

部件名 H8S/2214
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  936 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2214 数据表(HTML) 486 Page - Renesas Technology Corp

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Section 10 16-Bit Timer Pulse Unit (TPU)
Rev.4.00 Sep. 18, 2008 Page 426 of 872
REJ09B0189-0400
(4) 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 DTC or
DMAC is activated, the flag is cleared automatically. Figure 10.42 shows the timing for status flag
clearing by the CPU, and figure 10.43 shows the timing for status flag clearing by the DTC or
DMAC.
Status flag
Write signal
Address
φ
TSR address
Interrupt
request
signal
TSR write cycle
T1
T2
Figure 10.42 Timing for Status Flag Clearing by CPU
Interrupt
request
signal
Status flag
Address
φ
Source address
DTC/DMAC
read cycle
T1
T2
Destination
address
T1
T2
DTC/DMAC
write cycle
Figure 10.43 Timing for Status Flag Clearing by DTC/DMAC Activation



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