Information

SIM_SCGC7 field descriptions
Field Description
31–3
Reserved
This read-only field is reserved and always has the value zero.
2
MPU
MPU Clock Gate Control
This bit controls the clock gate to the MPU module.
0 Clock disabled
1 Clock enabled
1
DMA
DMA Clock Gate Control
This bit controls the clock gate to the DMA module.
0 Clock disabled
1 Clock enabled
0
FLEXBUS
FlexBus Clock Gate Control
This bit controls the clock gate to the FlexBus module.
0 Clock disabled
1 Clock enabled
12.2.15 System Clock Divider Register 1 (SIM_CLKDIV1)
The CLKDIV1 register cannot be written to when the device is in VLPR mode.
Address: SIM_CLKDIV1 is 4004_7000h base + 1044h offset = 4004_8044h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
OUTDIV1 OUTDIV2 OUTDIV3 OUTDIV4
0
W
Reset
x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x*
* Notes:
x = Undefined at reset.•
SIM_CLKDIV1 field descriptions
Field Description
31–28
OUTDIV1
Clock 1 output divider value
This field sets the divide value for the core/system clock. At the end of reset, it is loaded with either 0000
or 0111 depending on FTFL_FOPT[LPBOOT].
0000 Divide-by-1.
0001 Divide-by-2.
0010 Divide-by-3.
0011 Divide-by-4.
Table continues on the next page...
Chapter 12 System integration module (SIM)
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc. 283