LM3S9U92 Datasheet, PDF (490/1407 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

External Peripheral Interface (EPI)
Figure 9-18. FRAME Signal Operation, FRM50=0 and FRMCNT=2
Clock
(EPI0S31)
WR
(EPI0S28)
RD
(EPI0S29)
Frame
(EPI0S30)
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 9-19 on page 490.
Figure 9-19. FRAME Signal Operation, FRM50=1 and FRMCNT=0
Clock (EPI0S31)
WR (EPI0S28)
RD (EPI0S29)
Frame
(EPI0S30)
When FRMCNT=1, the FRAME signal transitions on the rising edge of the WR or RD strobes for
every other access, see Figure 9-20 on page 490.
Figure 9-20. FRAME Signal Operation, FRM50=1 and FRMCNT=1
Clock
(EPI0S31)
WR
(EPI0S28)
RD
(EPI0S29)
Frame
(EPI0S30)
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 9-21 on page 490.
Figure 9-21. FRAME Signal Operation, FRM50=1 and FRMCNT=2
CLOCK
(EPI0S31)
WR
(EPI0S28)
RD
(EPI0S29)
FRAME
(EPI0S30)
490
January 22, 2012
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