JAJSG08E November 2015 – December 2019 MSP430FR2532 , MSP430FR2533 , MSP430FR2632 , MSP430FR2633
PRODUCTION DATA.
The clock system includes a 32-kHz crystal 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 internal or external 32-kHz reference clock, and an on-chip asynchronous high-speed clock (MODOSC). The clock system is designed for cost-effective designs with minimal external components. A fail-safe mechanism is included for XT1. The clock system module offers the following clock signals.
All peripherals may have one or several clock sources depending on specific functionality. Table 6-7 lists the clock distribution used in this device.
CLOCK SOURCE SELECT BITS | MCLK | SMCLK | ACLK | MODCLK | XT1CLK | VLOCLK | EXTERNAL PIN | |
---|---|---|---|---|---|---|---|---|
Frequency Range | DC to 16 MHz | DC to 16 MHz | DC to 40 kHz | 5 MHz ±10% | DC to 40 kHz | 10 kHz ±50% | – | |
CPU | N/A | Default | – | – | – | – | – | – |
FRAM | N/A | Default | – | – | – | – | – | – |
RAM | N/A | Default | – | – | – | – | – | – |
CRC | N/A | Default | – | – | – | – | – | – |
I/O | N/A | Default | – | – | – | – | – | – |
TA0 | TASSEL | – | 10b | 01b | – | – | – | 00b (TA0CLK pin) |
TA1 | TASSEL | – | 10b | 01b | – | – | – | 00b (TA1CLK pin) |
TA2 | TASSEL | – | 10b | 01b | – | – | – | – |
TA3 | TASSEL | – | 10b | 01b | – | – | – | – |
eUSCI_A0 | UCSSEL | – | 10b or 11b | – | 01b | – | – | 00b (UCA0CLK pin) |
eUSCI_A1 | UCSSEL | – | 10b or 11b | – | 01b | – | – | 00b (UCA1CLK pin) |
eUSCI_B0 | UCSSEL | – | 10b or 11b | – | 01b | – | – | 00b (UCB0CLK pin) |
WDT | WDTSSEL | – | 00b | 01b | – | – | 10b or 11b | – |
ADC | ADCSSEL | – | 11b | 01b | 00b | – | – | – |
CapTIvate | CAPTSSEL | – | 00b | – | – | 01b | – | |
CAPCLKSEL | – | 1b | – | – | – | – | – | |
RTC | RTCSS | – | 01b | – | – | 10b | 11b | – |