MC68HC908JK3EMP MOTOROLA [Motorola, Inc], MC68HC908JK3EMP Datasheet - Page 105

• Manufacturer Part Number: MC68HC908JK3EMP
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

8.5.5 RC Oscillator Clock (RCCLK)
8.5.6 Oscillator Out 2 (2OSCOUT)
8.5.7 Oscillator Out (OSCOUT)
8.6 Low Power Modes
8.6.1 Wait Mode
8.6.2 Stop Mode
MC68H(R)C908JL3E/JK3E/JK1E
MOTOROLA
RCCLK is the RC oscillator output signal. Its frequency is directly
proportional to the time constant of the external R and C.
shows only the logical relation of RCCLK to OSC1 and may not
represent the actual circuitry.
2OSCOUT is same as the input clock (XTALCLK or RCCLK). 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 2OSCOUT, this signal
is driven to the SIM for generation of the bus clocks used by the CPU
and other modules on the MCU. OSCOUT will be divided again in the
SIM and results in the internal bus frequency being one fourth of the
XTALCLK or RCCLK 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. OSCOUT and
2OSCOUT continues to drive to the SIM module.
The STOP instruction disables the XTALCLK or the RCCLK output,
hence OSCOUT and 2OSCOUT.
—
Rev. 2.0
Oscillator (OSC)
Low Power Modes
Figure 8-2
Oscillator (OSC)
Technical Data
105