参数资料
型号: MC68HC05E6CDWR2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: PLASTIC, SOIC-28
文件页数: 13/140页
文件大小: 1141K
代理商: MC68HC05E6CDWR2
General Description
Mask options
MC68HC05E6 — Rev. 1.0
MOTOROLA
General Description
11
Mask options
There are two mask options on the MC68HC05E6 which are
programmed during manufacture and therefore must be specified on the
order form; COP watchdog timer enable/disable and STOP instruction
enable/disable.
LVI/options
register (LVI/OPT)
In addition, the IRQ pin can be configured to be either edge or
edge-and-level sensitive. This is done using the IRQ bit in the
LVI/options register at $0F.
There are two options on the MC68HC705E6 which are programmed
using configuration bits in the LVI/options register; COP watchdog timer
enable/disable and edge or edge-and-level sensitive IRQ triggering. The
STOP instruction is permanently enabled on the MC68HC705E6.
COP — Computer operating properly watchdog enable/disable
1 = COP watchdog disabled.
0 = COP watchdog enabled.
Reset clears this bit, thus the COP watchdog is enabled automatically
after reset. Because of the ‘write-once’ nature of the COP bit, it is
recommended that it be written to immediately after reset to lock the
desired state.
IRQ — Interrupt triggering sensitivity
1 = IRQ is negative edge-and-level sensitive
0 = IRQ is negative edge sensitive only
Reset clears the IRQ bit.
NOTE:
The bits in the LVIOPT register which are shaded are not relevant to this
section of the data sheet. These bits are described in Resets and
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
LVI/options (LVIOPT)
$000F LVIINT LVIVAL LVIRST LVIENA
COP
IRQ
0u00 0u00
3-gen
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