mc68hc705j2 Freescale Semiconductor, Inc, mc68hc705j2 Datasheet - Page 43

• Manufacturer Part Number: mc68hc705j2
• Description: 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

4.5 Low-Power Modes
4.5.1 STOP Mode
MC68HC705J2
The following paragraphs describe the STOP and WAIT modes. (Refer also to
6.2Data Retention Mode.)
The STOP instruction puts the MCU in its lowest power-consumption mode. In
STOP mode, the following events occur:
The STOP instruction does not affect any other registers or any I/O lines.
The following conditions bring the MCU out of STOP mode:
Refer to Figure 10-7 in SECTION 10 ELECTRICAL SPECIFICATIONS for
STOP recovery timing.
• The CPU clears TOF and RTIF, the timer interrupt flags in the timer
• The CPU clears TOIE and RTIE, the timer interrupt enable bits in the timer
• The CPU clears the divide-by-four timer prescaler.
• The CPU clears the interrupt mask in the condition code register,
• The internal oscillator stops, halting all internal processing, including
• An external interrupt.
• A reset signal on the RESET pin.
control and status register, removing any pending timer interrupts.
control and status register, disabling further timer interrupts.
enabling external interrupts.
operation of the timer and the COP timer.
program counter with the contents of locations $0FFA and $0FFB, the
locations of the vector address of the external interrupt service routine.
program counter with the contents of locations $0FFE and $0FFF, the
locations of the vector address of the reset service routine.
CENTRAL PROCESSOR UNIT
An external interrupt automatically loads the
A reset automatically loads the
MOTOROLA
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