JAJSCD6E August 2016 – June 2021 MSP430FR2000 , MSP430FR2100 , MSP430FR2110 , MSP430FR2111
PRODUCTION DATA
The clock system includes a 32-kHz low-frequency oscillator (XT1), an internal very-low-power low-frequency oscillator (VLO), an integrated 32-kHz RC oscillator (REFO), an integrated internal digitally controlled oscillator (DCO) that may use frequency-locked loop (FLL) locking with an internal or external 32-kHz reference clock, and on-chip asynchronous high-speed clock (MODOSC). The clock system is designed to target cost-effective designs with minimal external components. A fail-safe mechanism is designed for XT1. The clock system module offers the following clock signals.
All peripherals may have one or several clock sources depending on specific functionality. #GUID-8D35C5B7-21E3-4C28-A9CA-05E8B56D6163/SLASE785528 and #GUID-8D35C5B7-21E3-4C28-A9CA-05E8B56D6163/SLASE785437 summarize the clock distribution used in this device.
CLOCK SOURCE SELECT BITS | MCLK | SMCLK | ACLK | MODCLK | VLOCLK | EXTERNAL PIN | |
---|---|---|---|---|---|---|---|
Frequency Range | DC to 16 MHz | DC to 16 MHz | DC to 40 kHz | 4 MHz | 10 kHz | ||
CPU | N/A | Default | |||||
FRAM | N/A | Default | |||||
RAM | N/A | Default | |||||
CRC | N/A | Default | |||||
I/O | N/A | Default | |||||
TB0 | TBSSEL | 10b | 01b | 00b (TB0CLK pin) | |||
eUSCI_A0 | UCSSEL | 10b or 11b | 01b | 00b (UCA0CLK pin) | |||
WDT | WDTSSEL | 00b | 01b | 10b | |||
ADC(1) | ADCSSEL | 10b or 11b | 01b | 00b | |||
RTC | RTCSS | 01b(2) | 01b(2) | 11b |
OPERATION MODE | CLOCK SOURCE SELECT BITS | XTLFCLK |
---|---|---|
AM TO LPM3.5 (DC to 40 kHz) | ||
MCLK | SELMS | 10b |
SMCLK | SELMS | 10b |
REFO | SELREF | 0b |
ACLK | SELA | 0b |
RTC | RTCSS | 10b |