SABC517ALN Datasheet, PDF (19/72 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C517A
Reset and System Clock
The reset input is an active low input at pin RESET. Since the reset is synchronized internally, the
RESET pin must be held low for at least two machine cycles (24 oscillator periods) while the
oscillator is running. A pullup resistor is internally connected to V_DD 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_SS via a capacitor. Figure 7 shows the possible reset circuitries.
a)
b)
&
+
RESET
C517A
c)
RESET
C517A
Figure 7
Reset Circuitries
+
RESET
C517A
MCS03323
Semiconductor Group
17