Information

Table 5-2. Module clocks (continued)
Module Bus interface clock Internal clocks I/O interface 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 — —
EzPort System clock — EZP_CLK
Security
CRC Bus clock — —
Analog
ADC Bus clock OSCERCLK —
CMP 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 — —
RTC Flash clock EXTAL32 —
Communication interfaces
USB FS OTG System clock USB FS clock —
USB DCD Bus clock — —
DSPI Bus clock — DSPI_SCK
I
2
C Bus clock — I2C_SCL
UART0, UART1 System clock — —
UART2 Bus clock — —
I
2
S Bus clock I
2
S master clock I2S_TX_BCLK,
I2S_RX_BCLK
Human-machine interfaces
GPIO System clock — —
TSI Flash clock LPO, ERCLK32K,
MCGIRCLK
—
Chapter 5 Clock Distribution
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 147