mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 97

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

11.4.6 Internal Oscillator Clock (INTCLK)
11.4.7 Oscillator Out 2 (BUSCLKX4)
11.4.8 Oscillator Out (BUSCLKX2)
11.5 Low Power Modes
11.5.1 Wait Mode
11.5.2 Stop Mode
11.6 Oscillator During Break Mode
11.7 CONFIG2 Options
MC68HC908QF4 — Rev. 1.0
MOTOROLA
INTCLK is the internal oscillator output signal. Its nominal frequency is fixed to 4.0
MHz, but it can be also trimmed using the oscillator trimming feature of the
OSCTRIM register (see
BUSCLKX4 is the same as the input clock (XTALCLK, RCCLK, or INTCLK). This
signal is driven to the SIM module and is used to determine the COP cycles.
The frequency of this signal is equal to half of the BUSCLKX4, this signal is driven
to the SIM for generation of the bus clocks used by the CPU and other modules on
the MCU. BUSCLKX2 will be divided again in the SIM and results in the internal
bus frequency being one fourth of either the XTALCLK, RCCLK, or INTCLK
frequency.
The WAIT and STOP instructions put the MCU in low-power consumption standby
modes.
The WAIT instruction has no effect on the oscillator logic. BUSCLKX2 and
BUSCLKX4 continue to drive to the SIM module.
The STOP instruction disables either the XTALCLK, the RCCLK, or INTCLK
output, hence BUSCLKX2 and BUSCLKX4.
The oscillator continues to drive BUSCLKX2 and BUSCLKX4 when the device
enters the break state.
Two CONFIG2 register options affect the operation of the oscillator module:
OSCOPT1 and OSCOPT0. All CONFIG2 register bits will have a default
configuration. Refer to
information on how the CONFIG2 register is used.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Oscillator Module (OSC)
Section 5. Configuration Register (CONFIG)
11.3.1.1 Internal Oscillator Trimming).
Oscillator Module (OSC)
Low Power Modes
for more
Data Sheet
97