Information

• CoreSight
™
Embedded Trace Buffer (ETB) is a memory-mapped buffer to store trace data. Allows reconstruction of
program flow with standard JTAG tools.
• Test Port Interface Unit (TPIU) acts as a bridge between ITM or ETM and an off-chip Trace Port Analyzer
• Flash Patch and Breakpoints (FPB) implements hardware breakpoints and patches code and data from code space to
system space
System modules
4.5.2.1 Power Management Control Unit (PMC)
• Separate digital (regulated) and analog (referenced to digital) supply outputs
• Programmable power saving modes
• No output supply decoupling capacitors required
• Available wake-up from power saving modes via RTC and external inputs
• Integrated Power-on Reset (POR)
• Integrated Low Voltage Detect (LVD) with reset (brownout) capability
• Selectable LVD trip points
• 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 63 possible peripheral DMA sources
4.5.2.3 DMA Controller
• Up to 3216 fully programmable channels with 32-byte transfer control descriptors
• Data movement via dual-address transfers for 8-, 16-, 32-, 128-, and 256-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
System modules
K20 Family Product Brief, Rev. 11, 08/2012
36 Freescale Semiconductor, Inc.