参数资料
型号: XC68HC705X4DW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 24/168页
文件大小: 656K
代理商: XC68HC705X4DW
Introduction
MC68HC05X4 Rev 1.0
12
Introduction
MOTOROLA
Mask options on the MC68HC705X4
The same options as for the MC68HC05X4 are available on the
MC68HC705X4 device. These options must be programmed into the
mask option register (MOR), at EPROM address $1F00, via the
bootloader mode prior to operating the device in single chip mode. The
MOR is latched in at reset in single chip mode to allow emulation of the
masked ROM part. It is recommended that all unused bits in this register
are written as ‘0’.
Mask option
register (MOR)
This register may be written to only in bootloader mode.
DIV2 — Oscillator
division ratio
1 = Selects divide-by-2 option.
0 = Selects divide-by-10 option.
NOTE:
The divide-by-10 option is forced during tPORL (applies only to the
MC68HC705X4).
COP — Computer
operating
properly
enable/disable
1 = Disables COP.
0 = Enables COP.
Address:
$1F00
Bit 7
654321
Bit 0
DIV2
0
COP
Reset:
––––0000
Figure 2. Mask Option Register (MOR)
4-intro
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