參數(shù)資料
型號： ST62E30BF1
英文描述： MICROCONTROLLER|8-BIT|ST6200 CPU|CMOS|DIP|28PIN|CERAMIC
中文描述： 單片機| 8位| ST6200的CPU |的CMOS |雙酯| 28腳|陶瓷
文件頁數(shù)： 28/86頁
文件大小： 531K
代理商： ST62E30BF1
28/86
ST62T30B ST62E30B
DIGITAL WATCHDOG
(Cont’d)
These instructions test the C bit and Reset the
MCU (i.e. disable the Watchdog) if the bit is set
(i.e. if the Watchdog is active), thus disabling the
Watchdog.
In all modes, a minimum of 28 instructions are ex-
ecuted after activation, before the Watchdog can
generate a Reset. Consequently, user software
should load the watchdog counter within the first
27 instructions following Watchdog activation
(software mode), or within the first 27 instructions
executed following a Reset (hardware activation).
It shouldbe noted that when the GEN bit islow (in-
terrupts disabled), the NMI interrupt is active but
cannot cause a wake up fromSTOP/WAIT modes.
Figure 17. A typical circuit making use of the
EXERNAL STOP MODE CONTROL feature
Figure 18. Digital Watchdog Block Diagram
NMI
SWITCH
I/O
VR02002
RSFF
8
DATA BUS
VA00010
-2
-12
OSCILLATOR
CLOCK
RESET
WRITE
RESET
DB0
R
S
Q
DB1.7
SET
LOAD
7
8
-2
SET
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