C505-2RM SIEMENS [Siemens Semiconductor Group], C505-2RM Datasheet - Page 16

• Manufacturer Part Number: C505-2RM
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

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
an external capacitor only. An automatic reset can be obtained when
the RESET pin to
Figure 6
Reset Circuitries
Semiconductor Group
V
V
CC
CC
+
via a capacitor. Figure 6 shows the possible reset circuitries.
a)
RESET
V
C505CA
C505A
C505C
CC
C505
V
CC
+
c)
16
RESET
C505CA
C505A
C505C
C505
&
V
SS
b)
to allow a power-up reset with
V
RESET
C505CA
C505A
CC
C505C
C505
MCS03633
is applied by connecting
C505A / C505CA
C505 / C505C
1997-12-01