參數(shù)資料
型號： MC68HC705C9A
廠商： Motorola, Inc.
英文描述： Microcontrollers
中文描述： 微控制器
文件頁數(shù)： 25/160頁
文件大?。?/td> 2076K
代理商： MC68HC705C9A
General Description
Configuration Options
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
General Description
25
SPI output signals (MOSI, MISO, and SCK) require the
corresponding bits in the port D data direction register to be set for
output.
The port D wire-OR mode control bit (bit 5 of SPCR $000A) is
enabled, allowing open-drain configuration of port D.
The RESET pin becomes bidirectional; this pin is driven low by a
C9A COP or clock monitor timeout or during power-on reset.
When configured as an MC68HC05C12A:
Memory locations $0100–$0FFF are disabled, creating a memory
map identical to the MC68HC05C12A.
C12A options in the C12MOR ($3FF1) are enabled; these bits
control IRQ sensitivity, STOP instruction disable and C12 COP
enable.
The C9A option register ($3FDF) is disabled, preventing software
control over the IRQ sensitivity and the memory map
configuration.
The C9A COP reset register ($001D) and the C9A COP control
register ($001E) are disabled, preventing software control over the
C9A COP and clock monitor.
The C12 COP clear register ($3FF0) is enabled; this write-only
register is used to clear the C12 COP.
The port D data direction register ($0007) is disabled and the
seven port D pins become input only.
SPI output signals (MOSI, MISO, and SCK) do not require the data
direction register control for output capability.
The port D wire-OR mode control bit (bit 5 of SPCR $000A) is
disabled, preventing open-drain configuration of port D.
The RESET pin becomes input only.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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PDF描述
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