參數(shù)資料
型號(hào): MC68HC705J
廠商: Motorola, Inc.
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 41/162頁
文件大小: 683K
代理商: MC68HC705J
Memory
Mask Option Register
MC68HC705J1A
Rev. 4.0
Technical Data
MOTOROLA
Memory
41
Take these steps to program the mask option register:
1.
Apply the programming voltage, V
PP
, to the IRQ/V
PP
pin.
Write to the MOR.
2.
3.
Set the MPGM bit and wait for a time, t
MPGM
.
Clear the MPGM bit.
4.
5.
Reset the MCU.
SOSCD
Short Oscillator Delay Bit
The SOSCD bit controls the oscillator stabilization counter. The
normal stabilization delay following reset or exit from stop mode is
4064 t
cyc
. Setting SOSCD enables a short oscillator stabilization
delay.
1 = Short oscillator delay enabled
0 = Short oscillator delay disabled
EPMSEC
EPROM Security Bit
The EPMSEC bit controls access to the EPROM/OTPROM.
1 = External access to EPROM/OTPROM denied
0 = External access to EPROM/OTPROM not denied
OSCRES
Oscillator Internal Resistor Bit
The OSCRES bit enables a 2-M
internal resistor in the oscillator
circuit.
1 = Oscillator internal resistor enabled
0 = Oscillator internal resistor disabled
NOTE:
Program the OSCRES bit to logic 0 in devices using RC oscillators.
Address:
$07F1
Bit 7
6
5
4
3
2
1
Bit 0
Read:
SOSCD
EPMSEC OSCRES
SWAIT
SWPDI
PIRQ
LEVEL
COPEN
Write:
Reset:
Unaffected by reset
Figure 2-4. Mask Option Register (MOR)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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