mc908jl16 Freescale Semiconductor, Inc, mc908jl16 Datasheet - Page 44

• Manufacturer Part Number: mc908jl16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Configuration and Mask Option Registers (CONFIG and MOR)
3.5 Mask Option Register (MOR)
The mask option register (MOR) is implemented as a byte within the FLASH memory, and therefore can
only be written during a programming sequence of the FLASH memory. This register is read after a
power-on reset to determine the type of oscillator selected. (See
OSCSEL — Oscillator Select Bit
Bits 6–0 — Should be left as logic 1’s.
44
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.
1 = Crystal oscillator
0 = RC oscillator
Non-volatile FLASH register; write by programming.
Address: $FFD0
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
Bit 7
R
1
Figure 3-4. Mask Option Register (MOR)
= Reserved
R
6
1
MC68HC908JL16 Data Sheet, Rev. 1.1
R
5
1
NOTE
Unaffected by reset
R
4
1
R
3
1
Chapter 5 Oscillator
R
2
1
R
1
1
Freescale Semiconductor
(OSC).)
Bit 0
R
1