參數(shù)資料
型號: MC68HC05X4
廠商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 31/156頁
文件大?。?/td> 926K
代理商: MC68HC05X4
CPU
CPU Registers
MC68HC05X4 Rev 1.0
MOTOROLA
CPU
31
5-cpu
interrupt vector. If an interrupt request occurs while the interrupt mask is
set, the interrupt request is latched. Normally, the CPU processes the
latched interrupt as soon as the interrupt mask is cleared again.
A return from interrupt (RTI) instruction pulls the CPU registers from the
stack, restoring the interrupt mask to its cleared state. After any reset,
the interrupt mask is set and can be cleared only by a software
instruction.
Negative Flag
The CPU sets the negative flag when an arithmetic operation, logical
operation, or data manipulation produces a negative result.
Zero Flag
The CPU sets the zero flag when an arithmetic operation, logical
operation, or data manipulation produces a result of $00.
Carry/Borrow Flag
The CPU sets the carry/borrow flag when an addition operation
produces a carry out of bit 7 of the accumulator or when a subtraction
operation requires a borrow. Some logical operations and data
manipulation instructions also clear or set the carry/borrow flag.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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