mc68hc908gp32 Freescale Semiconductor, Inc, mc68hc908gp32 Datasheet - Page 159

• Manufacturer Part Number: mc68hc908gp32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

14.2 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).)
Freescale Semiconductor
Addr.
$FE03
$FE04
$FE05
$FE06
OSCSTOPENB
CONFIG
FROM
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Status Register 3
OSC2
OSC1
Register Name
SIM Break Flag Control
Register (SBFCR)
PHASE-LOCKED LOOP (PLL)
CGMRCLK
(INT1)
(INT2)
(INT3)
OSCILLATOR (OSC)
Figure 14-2. SIM I/O Register Summary (Continued)
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Figure 14-3. CGM Clock Signals
Bit 7
BCFE
MC68HC908GP32 Data Sheet, Rev. 10
IF14
IF6
R
R
R
0
0
0
0
0
= Unimplemented
IF13
IF5
CGMXCLK
6
R
R
R
R
0
0
0
0
CGMOUT
SIMDIV2
IF12
IF4
5
R
R
R
R
0
0
0
0
IF11
IF3
4
R
R
R
R
R
0
0
0
0
SIM COUNTER
÷ 2
TO TIMTB15A, ADC
Chapter 5 Clock Generator Module
= Reserved
SIM Bus Clock Control and Generation
IF10
IF2
GENERATORS
R
R
R
R
3
0
0
0
0
SIM
BUS CLOCK
Figure
USER MODE
MONITOR MODE
IF1
IF9
R
R
R
R
2
0
0
0
0
14-3. This clock can
IF16
IF8
1
R
R
R
R
0
0
0
0
SIMOSCEN
PTC3
IT12
TO REST
OF CHIP
IT23
TO REST
OF CHIP
Bit 0
IF15
IF7
R
R
R
R
0
0
0
0
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