MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 362
MC68HC908AZ32ACFU
Manufacturer Part Number
MC68HC908AZ32ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AZ32ACFU.pdf
(468 pages)
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Keyboard Module (KBD)
22.6 Low-Power Modes
22.6.1 Wait Mode
22.6.2 Stop Mode
22.7 Keyboard Module During Break Interrupts
Advance Information
362
The WAIT and STOP instructions put the MCU in low-power-
consumption standby modes.
The keyboard module remains active in wait mode. Clearing the
IMASKK bit in the keyboard status and control register enables keyboard
interrupt requests to bring the MCU out of wait mode.
The keyboard module remains active in stop mode. Clearing the
IMASKK bit in the keyboard status and control register enables keyboard
interrupt requests to bring the MCU out of stop mode.
The BCFE bit in the break flag control register (BFCR) enables software
to clear status bits during the break state. See
Module.
To allow software to clear the KEYF bit during a break interrupt, write a
logic 1 to the BCFE bit. If KEYF is cleared during the break state, it
remains cleared when the MCU exits the break state.
To protect the KEYF bit during the break state, write a logic 0 to the
BCFE bit. With BCFE at logic 0, writing to the keyboard acknowledge bit
(ACKK) in the keyboard status and control register during the break state
has no effect. See
363.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Keyboard Module (KBD)
Keyboard Status and Control Register
Section 11. Break
68HC908AZ32A — Rev 0.0
on page
MOTOROLA
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