Information

5.7 Module clocks
The following table summarizes the clocks associated with each module.
Table 5-2. Module clocks
Module Bus interface clock Internal clocks I/O interface clocks
Core modules
ARM Cortex-M4 core System clock Core clock —
NVIC System clock — —
DAP System clock — —
ITM System clock — —
ETM System clock TRACE clock TRACE_CLKOUT
ETB System clock — —
cJTAG, JTAGC — — JTAG_CLK
System modules
DMA System clock — —
DMA Mux Bus clock — —
Port control Bus clock LPO —
Crossbar Switch System clock — —
Peripheral bridges System clock Bus clock —
MPU System clock — —
LLWU, PMC, SIM Bus clock LPO —
Mode controller Bus clock — —
MCM System clock — —
EWM Bus clock LPO —
Watchdog timer Bus clock LPO —
Clocks
MCG Bus clock MCGOUTCLK,
MCGPLLCLK, MCGFLLCLK,
MCGIRCLK, OSCERCLK
—
OSC Bus clock OSCERCLK —
Memory and memory interfaces
Flash Controller System clock Flash clock —
Flash memory Flash clock — —
FlexBus System clock — FB_CLKOUT
EzPort System clock — EZP_CLK
Security
Table continues on the next page...
Chapter 5 Clock Distribution
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc. 173