mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 360

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

Keyboard Module (KBD)
Low-Power Modes
Wait Mode
Stop Mode
Keyboard Module During Break Interrupts
MC68HC08AZ60 — Rev 1.0
360
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
135.
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
361.
Freescale Semiconductor, Inc.
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Keyboard Module (KBD)
Keyboard Status and Control Register
Break Module
on page
MOTOROLA
on page
6-kbd