TMS320F28375DPZP datasheet(88/226 Pages) TI

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8.9.9.3 EMIF Electrical Data and Timing

8.9.9.3.1 Asynchronous RAM

Section 8.9.9.3.1.1 shows the EMIF asynchronous memory timing requirements. Section 8.9.9.3.1.2 shows the

EMIF asynchronous memory switching characteristics. Figure 8-21 through Figure 8-24 show the EMIF

asynchronous memory timing diagrams.

8.9.9.3.1.1 EMIF Asynchronous Memory Timing Requirements

NO.(1)

MIN

MAX

UNIT

Reads and Writes

EMIF clock period

tc(SYSCLK)

tw(EM_WAIT)

Pulse duration, EMxWAIT assertion and

deassertion

Reads

tsu(EMDV-EMOEH)

Setup time, EMxD[y:0] valid before EMxOE high

th(EMOEH-EMDIV)

Hold time, EMxD[y:0] valid after EMxOE high

tsu(EMOEL-EMWAIT)

Setup Time, EMxWAIT asserted before end of

Strobe Phase(2)

4E+20

Writes

tsu(EMWEL-EMWAIT)

Setup Time, EMxWAIT asserted before end of

Strobe Phase(2)

4E+20

(1)

E = EMxCLK period in ns.

(2)

Setup before end of STROBE phase (if no extended wait states are inserted) by which EMxWAIT must be asserted to add extended

wait states. Figure 8-22 and Figure 8-24 describe EMIF transactions that include extended wait states inserted during the STROBE

phase. However, cycles inserted as part of this extended wait period should not be counted; the 4E requirement is to the start of where

the HOLD phase would begin if there were no extended wait cycles.

8.9.9.3.1.2 EMIF Asynchronous Memory Switching Characteristics

NO.(1)

(2) (3)

PARAMETER

MIN

MAX

UNIT

Reads and Writes

td(TURNAROUND)

Turn around time

(TA)*E–3

(TA)*E+2

Reads

tc(EMRCYCLE)

EMIF read cycle time (EW = 0)

(RS+RST+RH)*E–3

(RS+RST+RH)*E+2

EMIF read cycle time (EW = 1)

(RS+RST+RH+

(EWC*16))*E–3

(RS+RST+RH+

(EWC*16))*E+2

tsu(EMCEL-EMOEL)

Output setup time, EMxCS[y:2] low

to EMxOE low (SS = 0)

(RS)*E–3

(RS)*E+2

Output setup time, EMxCS[y:2] low

to EMxOE low (SS = 1)

–3

th(EMOEH-EMCEH)

Output hold time, EMxOE high to

EMxCS[y:2] high (SS = 0)

(RH)*E–3

(RH)*E

Output hold time, EMxOE high to

EMxCS[y:2] high (SS = 1)

–3

tsu(EMBAV-EMOEL)

Output setup time, EMxBA[y:0]

valid to EMxOE low

(RS)*E–3

(RS)*E+2

th(EMOEH-EMBAIV)

Output hold time, EMxOE high to

EMxBA[y:0] invalid

(RH)*E–3

(RH)*E

tsu(EMAV-EMOEL)

Output setup time, EMxA[y:0] valid

to EMxOE low

(RS)*E–3

(RS)*E+2

th(EMOEH-EMAIV)

Output hold time, EMxOE high to

EMxA[y:0] invalid

(RH)*E–3

(RH)*E

TMS320F28379D, TMS320F28379D-Q1, TMS320F28378D, TMS320F28377D

TMS320F28377D-Q1, TMS320F28376D, TMS320F28375D, TMS320F28374D

SPRS880O – DECEMBER 2013 – REVISED FEBRUARY 2021

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