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Table 5-2. Module clocks (continued)
Module Bus interface clock Internal clocks I/O interface clocks
ARM Cortex-M4 core System clock Core clock —
NVIC System clock — —
DAP System clock — —
ITM 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, Flash clock —
LLWU, PMC, SIM, RCM Flash clock LPO —
Mode controller Flash clock — —
MCM System clock — —
EWM Bus clock LPO —
Watchdog timer Bus clock LPO —
Clocks
MCG Bus clock MCGOUTCLK, MCGPLLCLK,
MCGFLLCLK, MCGIRCLK,
OSCERCLK, EXTAL32K
—
OSC Bus clock OSCERCLK —
Memory and memory interfaces
Flash Controller System clock Flash clock —
Flash memory Flash clock — —
FlexBus System clock — CLKOUT
EzPort System clock — EZP_CLK
Security
CRC Bus clock — —
Analog
ADC Bus clock OSCERCLK —
CMP Bus clock — —
DAC Bus clock — —
VREF Bus clock — —
Timers
PDB Bus clock — —
FlexTimers Bus clock MCGFFCLK FTM_CLKINx
PIT Bus clock — —
LPTMR Flash clock LPO, OSCERCLK,
MCGIRCLK, ERCLK32K
—
CMT Bus clock — —
Table continues on the next page...
Chapter 5 Clock Distribution
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
Freescale Semiconductor, Inc.
Preliminary
169
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