MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 70

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Configuration & Mask Option Registers
Data Sheet
70
STOP_XCLKEN — X-tal Oscillator Stop Mode Enable Bit
OSCCLK1, OSCCLK0 — Oscillator Output Control Bits
SCIBDSRC — SCI Baud Rate Clock Source
Freescale Semiconductor, Inc.
STOP_XCLKEN enables the crystal (x-tal) oscillator to continue
operating during stop mode. Setting the STOP_XCLKEN bit allows
the x-tal oscillator to operate continuously even during stop mode.
This is useful for driving the timebase module to allow it to generate
periodic wake up while in stop mode. (See
(OSC).) Reset clears this bit.
OSCCLK1 and OSCCLK0 select which oscillator output to be driven
out as OSCCLK to the timebase module (TBM). Reset clears these
two bits.
SCIBDSRC selects the clock source used for the standard SCI
module (non-infrared SCI). The setting of this bit affects the frequency
at which the SCI operates.
For More Information On This Product,
1 = X-tal oscillator enabled to operate during stop mode
0 = X-tal oscillator disabled during stop mode
1 = Internal data bus clock, f
0 = Oscillator clock, CGMXCLK, is used as clock source for SCI
OSCCLK1
0
0
1
1
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OSCCLK0
0
1
0
1
BUS
, is used as clock source for SCI
MC68HC908AP Family — Rev. 2.5
Timebase Clock Source
Section 7. Oscillator
Internal oscillator (ICLK)
RC oscillator (RCCLK)
X-tal oscillator (XTAL)
Not used
MOTOROLA