XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 436

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Keyboard Module (KBD)
24.6 Low-Power Modes
24.6.1 Wait Mode
24.6.2 Stop Mode
24.7 Keyboard Module During Break Interrupts
Technical Data
436
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
page 203.
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
437.
Keyboard Module (KBD)
Keyboard Status and Control Register
MC68HC908AZ60A — Rev 2.0
Break Module (BRK)
on page
MOTOROLA
on