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27.4 Functional description
The PCC module provides on-chip peripherals (modules) their own dedicated PCC
registers for clock gating and configuration options. Each module's PCC register contains
a clock gating control bit (CGC) for the module's interface clock. Before a module can be
used, its interface clock must be enabled (CGC = 1) in the module's PCC register.
If a module has a functional clock, its PCC register may provide options for the clock
source, selected by programming the Peripheral Clock Select (PCS) field. Optionally, a
module may also have a clock divider, selected by programming the Peripheral Clock
Divider (PCD) field along with a Fraction (FRAC) field. Before configuring a functional
clock, the module's interface clock must be disabled (CGC = 0).
27.5 Memory map and register definition
Each module has its own dedicated PCC register, which controls the clock gating, clock
source and divider (when applicable) for that specific module. See each module's PCC
register for details.
PCC registers can be written only in supervisor mode using 32-bit accesses.
NOTE
To configure the clocking options available to a given module
or to modify an existing configuration, first disable the
module's interface clock by writing 0 to its CGC bit.
27.6 PCC register descriptions
27.6.1 PCC Memory map
PCC base address: 4006_5000h
Offset
Register
Width
(In bits)
Access
Reset value
80h
32
RW
C000_0000h
Table continues on the next page...
Chapter 27 Peripheral Clock Controller (PCC)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
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