mc68hc705j1avs Freescale Semiconductor, Inc, mc68hc705j1avs Datasheet - Page 41

• Manufacturer Part Number: mc68hc705j1avs
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC705J1A — Rev. 4.0
NOTE:
Address:
Take these steps to program the mask option register:
SOSCD — Short Oscillator Delay Bit
EPMSEC — EPROM Security Bit
OSCRES — Oscillator Internal Resistor Bit
Program the OSCRES bit to logic 0 in devices using RC oscillators.
Reset:
Read:
Write:
1. Apply the programming voltage, V
2. Write to the MOR.
3. Set the MPGM bit and wait for a time, t
4. Clear the MPGM bit.
5. Reset the MCU.
The SOSCD bit controls the oscillator stabilization counter. The
normal stabilization delay following reset or exit from stop mode is
4064 t
delay.
The EPMSEC bit controls access to the EPROM/OTPROM.
The OSCRES bit enables a 2-M
circuit.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = Short oscillator delay enabled
0 = Short oscillator delay disabled
1 = External access to EPROM/OTPROM denied
0 = External access to EPROM/OTPROM not denied
1 = Oscillator internal resistor enabled
0 = Oscillator internal resistor disabled
SOSCD
$07F1
Bit 7
cyc
. Setting SOSCD enables a short oscillator stabilization
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Figure 2-4. Mask Option Register (MOR)
EPMSEC OSCRES
6
Memory
5
Unaffected by reset
SWAIT
4
internal resistor in the oscillator
PP
SWPDI
3
, to the IRQ/V
MPGM
PIRQ
.
2
Mask Option Register
PP
LEVEL
1
Technical Data
pin.
COPEN
Memory
Bit 0