MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 198

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Oscillator
Technical Data
198
There are the following primary differences between the previous (’A’)
and new (’C’) Colpitts oscillator configurations:
Figure 13-2. MC68HC912Dx128C 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
OTA
ALC
C
X-EX
MC68HC912DT128A — Rev 4.0
C
X-VSS
BIAS
EN
GM
BUF
XTAL
MOTOROLA