Datasheet
• Programmable Low Voltage Warning (LVW) interrupt capability
• Buffered bandgap reference voltage output
• Factory programmed trim for bandgap and LVD
• 1 kHz Low Power Oscillator (LPO)
4.5.2.2 DMA Channel Multiplexer (DMA MUX)
• 16 independently selectable DMA channel routers
• 4 periodic trigger sources available
• Each channel router can be assigned to 1 of 64 possible peripheral DMA sources
4.5.2.3 DMA Controller
• Up to 32 fully programmable channels with 32-byte transfer control descriptors
• Data movement via dual-address transfers for 8-, 16-, 32- and 128-bit data values
• Programmable source, destination addresses, transfer size, support for enhanced address modes
• Support for major and minor nested counters with one request and one interrupt per channel
• Support for channel-to-channel linking and scatter/gather for continuous transfers with fixed priority and round-robin
channel arbitration
4.5.2.4 Watchdog Timer (WDOG)
• Independent, configurable clock source input
• Write-once control bits with unlock sequence
• Programmable timeout period
• Ability to test watchdog timer and reset
• Windowed refresh option
• Robust refresh mechanism
• Cumulative count of watchdog resets between power-on resets
• Configurable interrupt on timeout
4.5.2.5 External Watchdog Monitor (EWM)
• Independent 1 kHz LPO clock source
• Output signal to gate an external circuit which is controlled by CPU service or external input
4.5.2.6 System Clocks
• Frequency-locked loop (FLL)
• Digitally-controlled oscillator (DCO)
• DCO frequency range is programmable
• Option to program DCO frequency for a 32,768 Hz external reference clock source
• Internal or external reference clock can be used to control the FLL
• 0.2% resolution using 32 kHz internal reference clock
• 2% deviation over voltage and temperature using internal 32 kHz internal reference clock, 1% deviation with
limited temperature range (0°C to 70°C)
• Phase-locked loop (PLL)
• Voltage-controlled oscillator (VCO)
• External reference clock is used to control the PLL
System modules
K30 Family Product Brief, Rev. 8, 5/2011
Freescale Semiconductor, Inc. 19