MC912D60AVPVE8 Datasheet, PDF (180/460 Pages) Freescale Semiconductor, Inc – HC12 Microcontrollers

Oscillator
Technical Data
180
CFLT
2
RFLT
-
OTA
+
-
ALC
+
BUF
BIAS
EN
RFLT
CFLT
GM
RESD
EXTAL
C_X-EX
XTAL
Resonator C_X-VSS
Figure 12-2. MC68HC912D60C Colpitts Oscillator Architecture
There are the following primary differences between the previous (’A’)
and new (’C’) Colpitts oscillator configurations:
• 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.
Oscillator
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor