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HMS91C8032 датащи(PDF) 72 Page - Hynix Semiconductor

номер детали HMS91C8032
подробное описание детали  HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
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производитель  HYNIX [Hynix Semiconductor]
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HMS91C8032 датащи(HTML) 72 Page - Hynix Semiconductor

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HMS91C8032/97C8032
NOV., 2001 Ver 1.02
69
timer interrupt(Maskable Interrupt or Non Maskable Interrupt)
are selected by WDTMK flag. If maskable interrupt is selected by
WDTMK flag, the watchdog timer interrupt can be disabled by
IEWDT flag of the IE3 register. Refer Figure 4-29.
Watchdog timer restart
After the watchdog timer starts, resetting RUNWDT flag to 1
makes the 8-bit watchdog counter restart from the initial value
determined by WDTDR register. Once the watchdog timer starts,
setting RUNWDT flag to 1 does not stop the watchdog timer.
The watchdog timer continues operating in the IDLE mode but it
stops in the Power Down mode.
NOTE:
OSC : System clock frequency
Figure 4-29 Watchdog Timer Block Dragram
MI
NMI
WDTMK
RUNWDT
WDTMD[2:0]
ENWDT
WDTDR
Prescaler
8-bit
Counter
IRQWD
fXX
1/1
1/23
1/24
1/25
1/27
1/29
1/211
1/213
WDTMD[2:0]
Inadvertent Program Loop Detection Time
000
OSC (0.139us)
001
OSC / 2^3 (1.1us)
010
OSC / 2^4 (2.2us)
011
OSC / 2^5 (4.4us)
100
OSC / 2^7 (17.8us)
101
OSC / 2^9 (71.1us)
110
OSC / 2^11 (284us)
111
OSC / 2^13 (1138us)
Table 4-28 Watchdog Timer Inadvertent Program Loop Detection Times



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