MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 26

• Manufacturer Part Number: MC68HC05K1
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Technical Data
1.6.2.4 3-Pin RC Oscillator
Technical Data
NOTE:
Another low-cost option is the 3-pin RC oscillator configuration shown in
Figure
The OSC2 and PB1/OSC3 signals are square-type waves, and the
signal on OSC1 is a triangular-type wave. Short the OSC1 pin to the side
of resistor R, which is connected to capacitor C3. The 3-pin RC oscillator
configuration is recommended for frequencies of 1 MHz down to
100 kHz.
To use the 3-pin RC oscillator configuration, select the 3-pin RC
oscillator mask option when ordering the MCU.
In the 3-pin RC oscillator configuration the PEPROM of the
MC68HC05K1 cannot be programmed by user software. If the voltage
on IRQ/V
oscillator configuration and device operation will be disrupted.
Freescale Semiconductor, Inc.
For More Information On This Product,
1-8. The 3-pin oscillator is more stable than the 2-pin oscillator.
PP
Figure 1-8. 3-Pin RC Oscillator Connections
is raised above V
Go to: www.freescale.com
MCU
General Description
R
+
C3
PB1/OSC3
DD
, the oscillator will revert to a 2-pin
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
C3
OSC1
OSC2
V
V
DD
SS
C1 C2
R
V
V
DD
SS