SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
The operation of the FRAME signal is controlled by the FRMCNT and FRM50 bits. When FRM50 is clear, the FRAME signal is high whenever the WR or RD strobe is high. When FRMCNT is clear, the FRAME signal is simply the logical OR of the WR and RD strobes so the FRAME signal is high during every read or write access, see Figure 16-22.
If the FRMCNT field is 0x1, then the FRAME signal pulses high during every other read or write access, see Figure 16-23.
If the FRMCNT field is 0x2 and FRM50 is clear, then the FRAME signal pulses high during every third access, and so on for every value of FRMCNT, see Figure 16-24.
When FRM50 is set, the FRAME signal transitions on the rising edge of either the WR or RD strobes. When FRMCNT = 0, the FRAME signal transitions on the rising edge of WR or RD for every access, see Figure 16-25.
When FRMCNT = 1, the FRAME signal transitions on the rising edge of the WR or RD strobes for every other access, see Figure 16-26.
When FRMCNT = 2, the FRAME signal transitions the rising edge of the WR or RD strobes for every third access, and so on for every value of FRMCNT, see Figure 16-27.