參數(shù)資料
型號(hào): SAF-C505-LM
廠商: SIEMENS A G
元件分類: 微控制器/微處理器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, MQFP-44
文件頁數(shù): 18/85頁
文件大?。?/td> 487K
代理商: SAF-C505-LM
C505L
Data Sheet
16
06.99
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 low for at least two machine cycles (12 oscillator periods) while the
oscillator is running. A pull-down 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
DD
is applied by
connecting the RESET pin to
V
DD
via a capacitor.
Figure 6
shows the possible reset circuitries.
Figure 6
Reset Circuitries
a)
+
b)
+
C505L
RESET
c)
&
MCS03840
C505L
C505L
V
DD
DD
V
RESET
RESET
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