參數(shù)資料
型號: MC68HLC705KJ1CDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數(shù): 38/117頁
文件大?。?/td> 1644K
代理商: MC68HLC705KJ1CDW
Memory
Mask Option Register
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
Data Sheet
MOTOROLA
Memory
27
2.7.3 EPROM Erasing
The erased state of an EPROM bit is logic 0. Erase the EPROM by exposing it to
15 Ws/cm2 of ultraviolet light with a wavelength of 2537 angstroms. Position the
ultraviolet light source one inch from the EPROM. Do not use a shortwave filter.
2.8 Mask Option Register
The mask option register (MOR) is an EPROM/OTPROM byte that controls the
following options:
COP watchdog (enable or disable)
External interrupt pin triggering (edge-sensitive only or edge- and
level-sensitive)
Port A external interrupts (enable or disable)
Port pulldown resistors (enable or disable)
STOP instruction (stop mode or halt mode)
Crystal oscillator internal resistor (enable or disable)
EPROM security (enable or disable)
Short oscillator delay (enable or disable)
Take the following steps to program the mask option register (MOR):
1.
Apply the programming voltage, VPP, to the IRQ/VPP pin.
2.
Write to the MOR.
3.
Set the MPGM bit and wait for a time, tMPGM.
4.
Clear the MPGM bit.
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 tcyc. Setting
SOSCD enables a 128 tcyc stabilization delay.
1 = Short oscillator delay enabled
0 = Short oscillator delay disabled
Address:
$07F1
Bit 7
654321
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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