Information

SIM_SOPT2 field descriptions (continued)
Field Description
10 Off-chip instruction accesses are disallowed. Data accesses are allowed.
11 Off-chip instruction accesses and data accesses are allowed.
7–1
Reserved
This read-only field is reserved and always has the value zero.
0
MCGCLKSEL
MCG clock select
Selects the MCG's external reference clock.
0 System oscillator (OSCCLK)
1 32 kHz RTC oscillator
12.2.3 System Options Register 4 (SIM_SOPT4)
Address: SIM_SOPT4 is 4004_7000h base + 100Ch offset = 4004_800Ch
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
0
FTM2CLKSEL FTM1CLKSEL FTM0CLKSEL
0
FTM2CH0SRC FTM1CH0SRC
0
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
FTM2FLT0
0
FTM1FLT0
0
FTM0FLT2 FTM0FLT1 FTM0FLT0
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SIM_SOPT4 field descriptions
Field Description
31–27
Reserved
This read-only field is reserved and always has the value zero.
26
FTM2CLKSEL
FlexTimer 2 External Clock Pin Select
Selects the external pin used to drive the clock to the FTM2 module.
NOTE: The selected pin must also be configured for the FTM2 module external clock function through
the appropriate pin control register in the port control module.
0 FTM2 external clock driven by FTM_CLK0 pin.
1 FTM2 external clock driven by FTM_CLK1 pin.
Table continues on the next page...
Memory map and register definition
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
264 Freescale Semiconductor, Inc.