参数资料
型号: MC68HC705CT4FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.048 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 18/152页
文件大小: 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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