SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
The SSInFss signal can be programmed to assert low at the start of each byte transfer for one clock or the entire frame. This is configured by programming the FSSHLDFRM bit in the SSICR1 register as shown in Table 47-1. The EOM bit is also provided to signify end of frame transmission. This bit is embedded in the TXFIFO entry for use at the interface to deassert SSInFss at the appropriate time.
FSSHLDFRM Bit | Description |
---|---|
0 | For Freescale format, with SPH = 0, the SSInFss signal is asserted low between continuous transfers. |
For SPH = 1, the SSInFss signal is deasserted (high) between continuous transfers. | |
For TI format, the SSInFss signal is deasserted (high) after every data transfer. | |
1 | For Freescale format with any SPH value, the SSInFss signal is forced high between continuous transfers; it is asserted low when there is available data in the Tx FIFO; otherwise, it is forced high to be ready for a new frame. |