SAH-C515 SIEMENS [Siemens Semiconductor Group], SAH-C515 Datasheet - Page 41

• Manufacturer Part Number: SAH-C515
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 5-4
On-Chip Oscillator Circuitry
To drive the C515 with an external clock source, the external clock signal has to be applied to
XTAL2, as shown in figure 5-5. XTAL1 has to be left unconnected. A pullup resistor is suggested
(to increase the noise margin), but is optional if
specification of XTAL2.
Figure 5-5
External Clock Source
Semiconductor Group
1)
External
Clock
Crystal or Ceramic Resonator
XTAL1
Signal
C
1
1)
5-5
V
C
V
OH
2
CC
of the driving gate corresponds to the
N.C.
XTAL2
To Internal
Timing Circuitry
C515
XTAL1
XTAL2
Reset / System Clock
MCS03227
MCS03226
C515
C515
V
IH2