MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 58
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MC68HC908JK3
Manufacturer Part Number
MC68HC908JK3
Description
MC68HC908JK1
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JK3.pdf
(210 pages)
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Central Processor Unit (CPU)
6.5 Arithmetic/Logic Unit (ALU)
6.6 Low-Power Modes
6.6.1 Wait Mode
Technical Data
58
C — Carry/Borrow Flag
The ALU performs the arithmetic and logic operations defined by the
instruction set.
Refer to the CPU08 Reference Manual (Motorola document order
number CPU08RM/AD) for a description of the instructions and
addressing modes and more detail about the architecture of the CPU.
The WAIT and STOP instructions put the MCU in low power-consumption
standby modes.
The WAIT instruction:
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 instructions — such as bit test and
branch, shift, and rotate — also clear or set the carry/borrow flag.
•
•
1 = Carry out of bit 7
0 = No carry out of bit 7
Clears the interrupt mask (I bit) in the condition code register,
enabling interrupts. After exit from wait mode by interrupt, the I bit
remains clear. After exit by reset, the I bit is set.
Disables the CPU clock
Central Processor Unit (CPU)
MC68H(R)C908JL3
MOTOROLA
—
Rev. 1.0