參數(shù)資料
型號： MC68HC705CT4FN
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.048 MHz, MICROCONTROLLER, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 18/152頁
文件大?。?/td> 668K
代理商： MC68HC705CT4FN
NON-DISCLOSURE
AGREEMENT
REQUIRED
EPROM
General Release Specification
MC68HC705CT4 — Rev. 2.0
114
EPROM
MOTOROLA
15.4.3 Mask Option Register
The mask option register, MOR, contains programmable EPROM bits to
control mask options.
The MOR register is latched upon reset going away.
PCXPU — Port C Pullup (X is 7–4)
When set, the PCPU bit enables the pullup on the corresponding port
C pin. If the PCPU bit is cleared, the pullup devices are disabled. The
erased state of the PCPU bit is to be cleared, thereby disabling the
pullup devices.
PC23PU — Port C Bit 2 and 3 Pullups
When set, the PC23PU bit enables the pullups on both port C bits 2
and 3. If the PC23PU bit is cleared, the pullup devices are disabled.
The erased state of the PC23PU bit is to be cleared, thereby disabling
the pullup devices.
PC01PU — Port C Bit 0 and 1 Pullups
When set, the PC01PU bit enables the pullups on both port C bits 0
and 1. If the PC01PU bit is cleared, the pullup devices are disabled.
The erased state of the PC01PU bit is to be cleared, thereby disabling
the pullup devices.
COP — COP Enable
When set, this bit enables the COP watchdog timer.
When clear, the COP is disabled.
Address:
$1F00
Bit 7
654321
Bit 0
Read:
PC7PU
PC6PU
PC5PU
PC4PU
PC23PU
PC01PU
IRQ
COP
Write:
Reset:
00000000
Figure 15-5. Mask Option Register (MOR)
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