MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 93

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

7.2.1 CGM Reference Clock Selection
MC68HC908AP Family — Rev. 2.5
MOTOROLA
OSCSEL1
0
0
1
1
OSCSEL0
0
1
0
1
Address:
The clock generator module (CGM) reference clock (CGMXCLK) is the
reference clock input to the MCU. It is selected by programming two bits
in a FLASH memory location; the mask option register (MOR), at
$FFCF. See
The internal oscillator is a free running oscillator and is available after
each POR or reset. It is turned-off in stop mode by setting the
STOP_ICLKDIS bit in CONFIG2.
Erased:
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
Table 7-1. CGMXCLK Clock Selection
For More Information On This Product,
CGMXCLK
OSCSEL1 OSCSEL0
RCCLK
XCLK
$FFCF
ICLK
Bit 7
—
R
1
Go to: www.freescale.com
5.5 Mask Option Register
Figure 7-2. Mask Option Register (MOR)
= Reserved
6
1
OSC2 Pin
Inverting
output of
X-TAL
f
f
BUS
BUS
—
R
5
1
Not used
Internal oscillator generates the CGMXCLK.
RC oscillator generates the CGMXCLK.
Internal oscillator is available after each POR
or reset.
X-tal oscillator generates the CGMXCLK.
Internal oscillator is available after each POR
or reset.
Unaffected by reset
R
4
1
(MOR).
R
3
1
Comments
R
2
1
Oscillator (OSC)
Clock Selection
R
1
1
Data Sheet
Bit 0
R
1
93