mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 75

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

6.2 SIM Bus Clock Control and Generation
The bus clock generator provides system clock signals for the CPU and peripherals on the MCU. The
system clocks are generated from an incoming clock, CGMOUT, as shown in
come from either an external oscillator or from the on-chip PLL. (See
(CGM).)
6.2.1 Bus Timing
In user mode, the internal bus frequency is either the oscillator output (CGMXCLK) divided by four or the
PLL output (CGMVCLK) divided by six.
Freescale Semiconductor
STOP MODE CLOCK
$FE04
$FE05
$FE06
ENABLE SIGNALS
FROM CONFIG2
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Status Register 3
OSC2
OSC1
PHASE-LOCKED LOOP (PLL)
OSCILLATOR (OSC) MODULE
(INT1)
(INT2)
(INT3)
CGMRCLK
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Figure 6-2. SIM I/O Register Summary
Figure 6-3. CGM Clock Signals
IF14
IF6
MC68HC908JW32 Data Sheet, Rev. 5
R
R
R
0
0
0
0
= Unimplemented
IF13
IF5
R
R
R
0
0
0
0
CGMXCLK
CGMOUT
SIMDIV2
CGMXCLK
IF12
IF4
R
R
R
0
0
0
0
SYSTEM INTEGRATION MODULE
IF11
IF3
R
R
R
R
0
0
0
0
SIM COUNTER
÷ 2
TO TBM
Chapter 5 Clock Generator Module
= Reserved
SIM Bus Clock Control and Generation
IF10
IF2
R
R
R
0
0
0
0
GENERATORS
BUS CLOCK
Figure
USER MODE
MONITOR MODE
IF1
IF9
R
R
R
0
0
0
0
6-3. This clock can
IF8
R
R
R
0
0
0
0
0
SIMOSCEN
PTC1
IT12
TO REST
OF MCU
IT23
TO REST
OF MCU
IF15
IF7
R
R
R
0
0
0
0
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