参数资料
型号: MC68HC705C9ACS
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER
文件页数: 98/177页
文件大小: 1941K
代理商: MC68HC705C9ACS
General Description
Mask Options
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
General Description
27
1.5.2 C12 Mask Option Register (C12MOR)
The C12MOR register, shown in Figure 1-3, controls the following
options:
Select between MC68HC05C9A/C12A configuration
Enable/disable stop mode (C12A mode only)
Enable/disable COP (C12A mode only)
Edge-triggered only or edge- and level-triggered external interrupt
pin (IRQ pin) (C12A mode only).
C12A — C12A/C9A Mode Select Bit
This read/write bit selects between C12A configuration and C9A
configuration.
1 = Configured to emulate MC68HC05C12A
0 = Configured to emulate MC68HC05C9A
C12IRQ — C12A Interrupt Request Bit
This read/write bit selects between an edge-triggered only or edge-
and level-triggered external interrupt pin. If configured in C9A mode,
this bit has no effect and will be forced to 0 regardless of the
programmed state.
1 = Edge and level interrupt option selected
0 = Edge-only interrupt option selected
NOTE:
Any Port B pin configured for interrupt capability will follow the same
edge or edge/level trigger as the IRQ pin.
$3FF1
Bit 7
6
5
4
3
2
1
Bit 0
Read:
SEC
C12COPE
STOPDIS
C12IRQ
C12A
Write:
= Unimplemented
Figure 1-3. Mask Option Register 2
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