mc68hc912d60c Freescale Semiconductor, Inc, mc68hc912d60c Datasheet - Page 180

• Manufacturer Part Number: mc68hc912d60c
• Description: Hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Oscillator
Technical Data
180
There are the following primary differences between the previous (’A’)
and new (’C’) Colpitts oscillator configurations:
Figure 12-2. MC68HC912D60C Colpitts Oscillator Architecture
•
•
Hysteresis was added to the clock input buffer to reduce sensitivity
to noise
Internal parasitics were reduced from EXTAL to VSS to increase
oscillator gain margin.
CFLT
2
Oscillator
EXTAL
CFLT
RFLT
RFLT
Resonator
-
+
-
+
RESD
ALC
OTA
C
X-EX
MC68HC912D60A — Rev. 3.1
C
X-VSS
BIAS
EN
GM
Freescale Semiconductor
BUF
XTAL