mc68hc908rc24d Freescale Semiconductor, Inc, mc68hc908rc24d Datasheet - Page 121

• Manufacturer Part Number: mc68hc908rc24d
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908RC24 — Rev. 1.1
Freescale Semiconductor
NOTE:
Period and frequency calculations shown in
by the state of the DIV2 bit.
When DIV2 is set:
When DIV2 is clear:
Crystal
(MHz)
8
8
4
4
CMTCLK
CMTCLK
CGMXCLK
Carrier Modulator Transmitter (CMT)
Internal
(MHz)
Bus
2
2
1
1
=
=
Table 12-1. System Clock Examples
Figure 12-1. CMT Clock Generation
CGMOUT
CGMOUT
--------------------------- -
(Feed to CMT)
÷2
CGMOUT
2
(MHz)
4
4
2
2
CGMOUT
=
=
CGMOUT
CGMXCLK
-------------------------------
CGMXCLK
-------------------------------
DIV2
4
Bit
2
0
1
0
1
GENERATOR
÷2
Resolution
Generator
CLOCK
BUS
Carrier
÷2
Carrier Modulator Transmitter (CMT)
0.25
(µs)
0.5
0.5
1
Table 12-1
MUX
DIV2
BUS CLOCKS
CTM MODULE
Min Carrier
Generator
Period
CMTCLK
(µs)
REGISTERS
0.5
Advance Information
1
1
2
CMT
will be affected
Clock Generation
Modulator
Period
Min
(µs)
2
4
4
8
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