MC68HC908LB8_05 Datasheet, PDF (115/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

11.7 Keyboard Interrupt Module (KBI)
Keyboard Interrupt Module (KBI)
11.7.1 Wait Mode
The keyboard interrupt (KBI) 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.
11.7.2 Stop 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.
11.8 High Resolution PWM (HRP)
11.8.1 Wait Mode
The HRP remains active after the execution of a WAIT instruction. In wait mode the HRP registers are not
accessible by the CPU. Any enabled CPU interrupt request from the HRP can bring the MCU out of wait
mode. If HRP functions are not required during wait mode, reduce power consumption by stopping the
HRP before executing the WAIT instruction.
11.8.2 Stop Mode
The HRP is inactive after the execution of a STOP instruction. The TOP and BOT outputs are both set to
logic 0 and the HRPEN bit in the HRPCTRL register is set to 0 after execution of the STOP instruction.
The STOP instruction does not affect other register conditions or the state of the HRP counters. When
the MCU exits stop mode after an external interrupt, the HRP is inactive because the HRPEN bit is set to
0.
NOTE
The HRP shutdown pin remains active during Stop mode.
11.9 Low-Voltage Inhibit Module (LVI)
11.9.1 Wait Mode
If enabled, the low-voltage inhibit (LVI) module remains active in wait mode. If enabled to generate resets,
the LVI module can generate a reset and bring the MCU out of wait mode.
11.9.2 Stop Mode
If enabled, the LVI module remains active in stop mode. If enabled to generate resets, the LVI module
can generate a reset and bring the MCU out of stop mode.
MC68HC908LB8 Data Sheet, Rev. 1
Freescale Semiconductor
115