C505_9708 SIEMENS [Siemens Semiconductor Group], C505_9708 Datasheet - Page 60

• Manufacturer Part Number: C505_9708
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 5-5
On-Chip Oscillator Circuiry
To drive the C505 with an external clock source, the external clock signal has to be applied to
XTAL1, as shown in figure 5-6. XTAL2 has to be left unconnected. A pullup resistor is suggested
(to increase the noise margin), but is optional if
specification of XTAL1.
Figure 5-6
External Clock Source
Semiconductor Group
External
Clock
Signal
*) Crystal or ceramic resonator
XTAL2
C
1
*)
5-7
C
V
2
V
CC
OH
XTAL1
of the driving gate corresponds to the
N.C.
To internal
timing circuitry
MCS03294
XTAL2
XTAL1
MCS03293
C505
C505
System Reset
C505 / C505C
1997-08-01
V
IH2