MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 111

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

8.3 Oscillator Selection
MC68HC908JL8
MOTOROLA
NOTE:
NOTE:
—
Rev. 2.0
Non-volatile FLASH register; write by programming.
Address:
The oscillator type is selected by programming a bit in a FLASH memory
location; the mask option register (MOR), at $FFD0.
(See
On the ROM device, the oscillator is selected by a ROM-mask layer at
factory.
OSCSEL — Oscillator Select Bit
Bits 6–0 — Should be left as logic 1’s.
When Crystal oscillator is selected, the OSC2/RCCLK/PTA6/KBI6 pin is
used as OSC2; other functions such as PTA6/KBI6 will not be available.
Erased:
Reset:
Read:
Write:
OSCSEL selects the oscillator type for the MCU. The erased or
unprogrammed state of this bit is logic 1, selecting the crystal
oscillator option. This bit is unaffected by reset.
Freescale Semiconductor, Inc.
For More Information On This Product,
5.6 Mask Option Register
1 = Crystal oscillator
0 = RC oscillator
OSCSEL
$FFD0
Bit 7
R
1
Go to: www.freescale.com
Figure 8-1. Mask Option Register (MOR)
= Reserved
Oscillator (OSC)
R
6
1
R
5
1
Unaffected by reset
(MOR).)
R
4
1
R
3
1
R
2
1
Oscillator Selection
Oscillator (OSC)
R
1
1
Technical Data
Bit 0
R
1
111