參數資料
型號: Q67126-C2001
廠商: SIEMENS AG
元件分類: 8位微控制器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8位CMOS微控制器
文件頁數: 15/65頁
文件大?。?/td> 427K
代理商: Q67126-C2001
Semiconductor Group
15
1997-10-01
C540U
C541U
Reset and System Clock
The reset input is an active high input at pin RESET. Since the reset is synchronized internally, the
RESET pin must be held high for at least two machine cycles (12 oscillator periods) while the
oscillator is running. A pulldown resistor is internally connected to
V
SS
to allow a power-up reset with
an external capacitor only. An automatic reset can be obtained when
V
CC
is applied by connecting
the RESET pin to
V
CC
via a capacitor.
Figure 7
shows the possible reset circuitries.
Figure 7
Reset Circuitries
a)
+
b)
+
RESET
c)
&
MCD03376
C540U
C541U
V
CC
CC
V
RESET
RESET
CC
V
C541U
C540U
C541U
C540U
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