參數(shù)資料
型號： MC68HC805P18CDW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, EEPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝： SOIC-28
文件頁數(shù)： 77/144頁
文件大?。?/td> 1292K
代理商： MC68HC805P18CDW
Advance Information
MC68HC(8)05P18 — Rev. 2.0
38
Central Processing Unit (CPU)
MOTOROLA
Central Processing Unit (CPU)
3.3.3.3 Negative (N)
When set, this bit indicates that the result of the last arithmetic, logical,
or data manipulation was negative.
3.3.3.4 Zero (Z)
When set, this bit indicates that the result of the last arithmetic, logical,
or data manipulation was 0.
3.3.3.5 Carry/Borrow (C)
When set, this bit indicates that a carry or borrow out of the arithmetic
logical unit (ALU) occurred during the last arithmetic operation. This bit
is also affected during bit test and branch instructions and during shifts
and rotates.
3.3.4 Stack Pointer (SP)
The stack pointer contains the address of the next free location on the
stack. During an MCU reset or the reset stack pointer (RSP) instruction,
the stack pointer is set to location $00FF. The stack pointer is then
decremented as data is pushed onto the stack and incremented as data
is pulled from the stack.
When accessing memory, the seven most significant bits are
permanently set to 0000011. These seven bits are appended to the six
least significant register bits to produce an address within the range of
$00FF to $00C0. Subroutines and interrupts may use up to 64 (decimal)
locations. If 64 locations are exceeded, the stack pointer wraps around
and loses the previously stored information. A subroutine call occupies
two locations on the stack; an interrupt uses five locations.
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SP
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)PDF資料
PDF描述
MC68HC805P18DW 8-BIT, EEPROM, MICROCONTROLLER, PDSO28
MC68HC805P18CDW 8-BIT, EEPROM, MICROCONTROLLER, PDSO28
MC68HC805P18P 8-BIT, EEPROM, MICROCONTROLLER, PDIP28
MC68HC805P18MDW 8-BIT, EEPROM, MICROCONTROLLER, PDSO28
MC68HC805P18MP 8-BIT, EEPROM, MICROCONTROLLER, PDIP28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC805P18MDW 制造商:Freescale Semiconductor 功能描述:
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