NOTE
All asynchronous clock sources will also be restricted to 4 MHz
in VLPR/VLPS mode as configured in SCG_SIRCDIV.
25.4.1 Clock divider values after reset
The default configuration out of reset has the CPU clocked by the Fast IRC
(FIRC_CLK). The clocks (for example, CORE_CLK, FLASH_CLK, and BUS_CLK) are
configured in the SCG module (see
Memory Map/Register Definition
25.4.2 HSRUN mode clocking
Clock dividers should not be modified while the chip is operating in HSRUN mode. They
must be configured prior to entering HSRUN mode to guarantee:
• CORE_CLK/SYS_CLK is less than or equal to 112MHz
• BUS_CLK is less than or equal to 56 MHz
• FLASH_CLK is less than or equal to 28 MHz
25.4.3 VLPR mode clocking
Clock dividers should not be modified while the chip is operating in VLPR mode. They
must be configured prior to entering VLPR mode to guarantee:
• CORE_CLK/SYS_CLK and BUS_CLK are less than or equal to 4 MHz
• FLASH_CLK is less than or equal to 1 MHz
NOTE
All asynchronous clock sources will also be restricted to 4 MHz
in VLPR/VLPS mode as configured in SCG_SIRCDIV.
25.4.4 VLPR/VLPS mode entry
When entering VLPR/VLPS mode, the system clock should be SIRC. The FIRC, SOSC
and SPLL must be disabled by software in RUN mode before making any mode
transition.
Internal clocking requirements
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
516
NXP Semiconductors
Содержание MWCT101 S Series
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