MC68HC908AZ60 Datasheet, PDF (96/480 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Central Processor Unit (CPU)
Arithmetic/logic unit (ALU)
The ALU performs the arithmetic and logic operations defined by the
instruction set.
Refer to the CPU08 Reference Manual (Motorola document number
CPU08RM/AD) for a description of the instructions and addressing
modes and more detail about CPU architecture.
Low-power modes
The WAIT and STOP instructions put the MCU in low--power
consumption standby modes.
WAIT mode
The WAIT instruction:
• 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
STOP mode
The STOP instruction:
• clears the interrupt mask (I bit) in the condition code register,
enabling external interrupts. After exit from STOP mode by
external interrupt, the I bit remains clear. After exit by reset, the I
bit is set.
• Disables the CPU clock
After exiting STOP mode, the CPU clock begins running after the
oscillator stabilization delay.
MC68HC908AZ60 — Rev 2.0
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Central Processor Unit (CPU)
8-cpu
MOTOROLA