MSP432P401R Datasheet, PDF (86/157 Pages) Texas Instruments – Mixed-Signal Microcontrollers

MSP432P401R, MSP432P401M
SLAS826B – MARCH 2015 – REVISED FEBRUARY 2016
www.ti.com
6.7.4 Clock System (CS)
The CS contains the sources of the various clocks in the device and also controls the mapping between
sources and the clock domains in the device.
6.7.4.1 LFXT
The LFXT supports 32.768-kHz low-frequency crystals.
6.7.4.2 HFXT
The HFXT supports high-frequency crystals up to 48 MHz.
6.7.4.3 DCO
The DCO is a power-efficient tunable internal oscillator that generates up to 48 MHz. It also supports a
high-precision mode when using an external precision resistor.
6.7.4.4 Very Low-Power Low-Frequency Oscillator (VLO)
The VLO is an ultra-low-power internal oscillator that generates a low-accuracy clock at typical frequency
of 9.4 kHz.
6.7.4.5 Low Frequency Reference Oscillator (REFO)
The REFO can be used as an alternate low-power lower-accuracy source of a 32.768-kHz clock instead of
the LFXT. REFO can also be programmed to generate a 128-kHz clock.
6.7.4.6 Module Oscillator (MODOSC)
The MODOSC is an internal clock source that has a very low latency wake-up time. MODOSC is factory-
calibrated to a frequency of 25 MHz. It is typically used to supply a 'clock on request' to modules like the
ADC (when in 1-Msps conversion mode).
6.7.4.7 System Oscillator (SYSOSC)
The SYSOSC is a lower-frequency version of the MODOSC and is factory calibrated to a frequency of 5
MHz. It drives the ADC sampling clock in the 200-ksps conversion mode. In addition, it is also used for
timing of various system-level control and management operations.
6.7.4.8 Fail-Safe Mechanisms
All clock sources that operate with external components have a built-in fail-safe mechanism that
automatically switches to the relevant backup source, thereby ensuring that spurious or unstable clocks
never impact the device behavior.
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Detailed Description
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