MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 71

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

5.5 Mask Option Register (MOR)
MC68HC908AP Family — Rev. 2.5
MOTOROLA
OSCSEL1
0
0
1
1
NOTE:
OSCSEL0
0
1
0
1
Address:
The mask option register (MOR) is used for selecting one of the three
clock options for the MCU. The MOR is a byte located in FLASH
memory, and is written to by a FLASH programming routine.
OSCSEL1, OSCSEL0 — Oscillator Selection Bits
Bits 5–0 — Should be left as 1’s.
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:
OSCSEL1 and OSCSEL0 select which oscillator is used for the MCU
CGMXCLK clock. The erase state of these two bits is logic 1. These
bits are unaffected by reset. (See
Freescale Semiconductor, Inc.
Table 5-1. CGMXCLK Clock Selection
For More Information On This Product,
CGMXCLK
OSCSEL1 OSCSEL0
RCCLK
X-TAL
$FFCF
ICLK
Bit 7
—
R
1
Go to: www.freescale.com
Figure 5-4. Mask Option Register (MOR)
= Reserved
6
1
OSC2 pin
Inverting
output of
XTAL
f
f
BUS
BUS
—
Configuration & Mask Option Registers (CONFIG & MOR)
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
Table
R
3
1
5-1).
Comments
Mask Option Register (MOR)
R
2
1
R
1
1
Data Sheet
Bit 0
R
1
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