MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 113

• Manufacturer Part Number: MC68HC908KX2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

7.4.5 Clock Selection Circuit
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
The clock selection circuit, shown in
switches which generate the oscillator output clock (CGMXCLK) and the
timebase clock (TBMCLK) from either the internal clock (ICLK) or the
external clock (ECLK). The clock selection circuit also contains a divide-
by-two circuit which creates the clock generator output clock
(CGMOUT), which generates the bus clocks.
RESET
Internal Clock Generator Module (ICG)
ECGON
ECLK
EOFF
IOFF
ICLK
V
CS
Figure 7-7. Clock Selection Circuit Block Diagram
NAME
NAME
SS
CONFIGURATION (OR MOR) REGISTER BIT
TOP LEVEL SIGNAL
SELECT
ICLK
ECLK
IOFF
EOFF
FORCE_I
FORCE_E
SELECT
ICLK
ECLK
IOFF
EOFF
FORCE_I
FORCE_E
SYNCHRONIZING
SYNCHRONIZING
SWITCHER
SWITCHER
Figure
CLOCK
CLOCK
Internal Clock Generator Module (ICG)
OUTPUT
OUTPUT
7-7, contains two clock
NAME
NAME
DIV2
Functional Description
MODULE SIGNAL
REGISTER BIT
Technical Data
CGMXCLK
CGMOUT
TBMCLK
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