Datasheet

• Configurable button- and slider-sensitive interrupts
• Operation in low-power modes allows wakeup from lowest power mode via a single touch
• Option to use internal reference clock
4.5.8.3 Segment LCD
• LCD waveforms functional in low-power modes
• Up to 48 LCD pins with selectable frontplane/backplane configuration
• Generate up to 44 frontplane signals
• Generate up to 8 backplanes signals
• Programmable LCD frame frequency
• Programmable blink modes and frequency
• All segments blank during blink period
• Alternate display for each LCD segment in x4 or less mode
• Blink operation in low-power modes
• Programmable LCD power supply switch, making it an ideal solution for battery-powered and board-level applications
• Charge pump requires only four external capacitors
• Internal LCD power using VDD
• Internal VIREG regulated power supply option for 3 V or 5 V LCD glass
• External VLL3 power supply option (3 V)
• Internal-regulated voltage source with a 4-bit trim register to apply contrast control
• Integrated charge pump for generating LCD bias voltages
• Hardware-configurable to drive 3 V or 5 V LCD panels
• On-chip generation of bias voltages
• Waveform storage registers
• Backplane reassignment to assist in vertical scrolling on dot-matrix displays
• Software-configurable LCD frame frequency interrupt
5 Power modes
The power management controller (PMC) provides the user with multiple power options. All together 10 different modes of
operation are supported to allow the user to optimize power consumption for the level of functionality needed.
Depending on the stop requirements of the user application, a variety of stop modes are available that provide state retention,
partial power down or full power down of certain logic and/or memory. I/O states are held in all modes of operation. The
following table compares the various power modes available.
For each run mode there is a corresponding wait and stop mode. Wait modes are similar to ARM sleep modes. Stop modes
(VLPS, STOP) are similar to ARM sleep deep mode. The very low power run (VLPR) operating mode can drastically reduce
runtime power when the maximum bus frequency is not required to handle the application needs.
Power modes
K30 Family Product Brief, Rev. 8, 5/2011
Freescale Semiconductor, Inc. 27