SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
The transmitter core registers and control logic run off of the device system clock (SYSCLK).
The FSI Transmit Clock (TXCLK) is derived from PLLRAWCLK. PLLRAWCLK is divided down by configuring the clock prescaler value (TX_CLK_CTRL.PRESCALE_VAL) then setting the clock divider enable bit (TX_CLK_CTRL.CLK_EN). The clock prescaler value can be set to divide PLLRAWCLK by 1 (TX_CLK_CTRL.PRESCALE_VAL = 0x0 or 0x1) through 255(TX_CLK_CTRL.PRESCAL_VAL = 0xFF). Though TXCLK and SYSCLK are both derived from PLLRAWCLK, TXCLK is asynchronous with respect to SYSCLK.