• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 434 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS570LS3137: Emif interfacing with MT28EW01GABA (NOR flash from Micron )

Rohini Chavan
Prodigy 120 points
Part Number: TMS570LS3137
Other Parts Discussed in Thread: HALCOGEN

Hello,

We want to interface MT28EW01GABA (NOR flash from Micron ) with EMIF Interface

We not clear on how to derive the inputs required for HALCoGen like (R_STROBE,W_STROBE etc. )

We are not clear on what while we have to give for EMIF_CLOCK in the below formula and EMIF_Clock is not used .
W_SETUP + W_STROBE + W_HOLD >= tAVAV × fEMIF_CLK - 3

Even in the TRM example (Figure 17-27. Example Configuration Interface)   the EMIF_CLK is not used for Flash memory

Please help.

Regards,

Rohini

  • 0
    TI__Guru**** 196526 points

    R_Strobe and W_Strobe define the length (EMIF clock cycles) of assertation of EMIF_nOE pin or EMIF_nWE pin. The proper values can be determined by referring to the AC Characteristics in the NOR Flash datasheet and EMIF spec. 

    Please read the section of 17.4 Example Configuration in EMIF chapter of TRM

    Rohini Chavan said:
    We are not clear on what while we have to give for EMIF_CLOCK in the below formula and EMIF_Clock is not used .
    W_SETUP + W_STROBE + W_HOLD >= tAVAV × fEMIF_CLK - 3

    W_SETUP, W_STROBE and W_HOLD are write setup time, strobe time and hold time in EMIF_Clock cycles (minus 1 cycle). The tAVAV or tRC is  the flash address valid time in ns. tAVAV × fEMIF_CLK is EMIF clock cycles.