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SH7041A bảng dữ liệu(PDF) 504 Page - Renesas Technology Corp

tên linh kiện SH7041A
Giải thích chi tiết về linh kiện  Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
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nhà sản xuất  RENESAS [Renesas Technology Corp]
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SH7041A bảng dữ liệu(HTML) 504 Page - Renesas Technology Corp

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13.4Notes on Use
13.4.1
TCNT Write and Increment Contention
If a timer counter (TCNT) increment clock pulse is generated during the T3 state of a write cycle
to the TCNT, the write takes priority and the timer counter is not incremented (figure 13.8).
CK
Address
Internal
write signal
TCNT
input clock
TCNT
NM
TCNT address
Counter write data
T1
T2
T3
TCNT write cycle
Figure 13.8 Contention between TCNT Write and Increment
13.4.2
Changing CKS2–CKS0 Bit Values
If the values of bits CKS2–CKS0 are altered while the WDT is running, the count may increment
incorrectly. Always stop the watchdog timer (by clearing the TME bit to 0) before changing the
values of bits CKS2–CKS0.
13.4.3
Changing between Watchdog Timer/Interval Timer Modes
To prevent incorrect operation, always stop the watchdog timer (by clearing the TME bit to 0)
before switching between interval timer mode and watchdog timer mode.



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