MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 109
MC68HC908KX2
Manufacturer Part Number
MC68HC908KX2
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908KX2.pdf
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7.4.4 Clock Monitor Circuit
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
The ICG contains a clock monitor circuit which, when enabled, will
continuously monitor both the external clock (ECLK) and the internal
clock (ICLK) to determine if either clock source has been corrupted. The
clock monitor circuit, shown in
•
•
•
Clock monitor reference generator
Internal clock activity detector
External clock activity detector
EXTSLOW
EXTXTALEN
Internal Clock Generator Module (ICG)
NAME
NAME
ECGEN
ICGEN
CMON
FICGS
IBASE
ECLK
Figure 7-4. Clock Monitor Block Diagram
CONFIGURATION (OR MOR) REGISTER BIT
TOP LEVEL SIGNAL
FICGS
IBASE
ICGEN
EREF
IBASE
ICGON
EXTXTALEN
EXTSLOW
ECGS
ECLK
ECGEN
IREF
ECGEN
ECLK
CMON
CMON
ESTBCLK
Figure
DETECTOR
DETECTOR
ACTIVITY
ACTIVITY
7-4, contains these blocks:
ICLK
ECLK
Internal Clock Generator Module (ICG)
GENERATOR
REFERENCE
ESTBCLK
EREF
ECGS
EOFF
IREF
IOFF
ICGS
NAME
NAME
Functional Description
MODULE SIGNAL
REGISTER BIT
Technical Data
ECGS
ICGS
IOFF
EOFF
109
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