TMS570LS datasheet(89/107 Pages) TI1

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TMS570LS20206-EP, TMS570LS20216-EP

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SPNS209A – JUNE 2012 – REVISED AUGUST 2012

7.14 EMIF Timings

Table 7-19. EMIF Read/Write Mode Switching Characteristics(1)(2)

Parameter

Description

MIN

MAX

Unit

Reads and Writes

td(TURNAROUND)

(

Turn around time

(TA + 1) * E -

tr(CS) - 2

tr(CS) + 3

Reads

tc(EMRCYCLE)

EMIF read cycle time

(RS + RST +

RH + TA +4) *

E - tf(CS) - 3

E - tf(CS) + 3

tsu(EMCSL-EMOEL) Output setup time, EMIFCS[3:0] low to EMIFOE

(RS +1) * E -

low (SS=0)

tf(CS) + tf(OE) - 5

tf(CS) + tf(OE) + 5

Output setup time, EMIFCS[3:0] low to EMIFOE

- tf(CS) + tf(OE) -

- tf(CS) + tf(OE) +

low (SS=1)

th(EMOEH-EMCSH) Output hold time, EMIFOE high to EMIFCS[3:0]

(RH +1) * E -

high (SS=0)

tr(OE) + tr(CS) - 4 tr(OE) + tr(CS) + 6

Output hold time, EMIFOE high to EMIFCS[3:0]

- tr(OE) + tr(CS) -

- tr(OE) + tr(CS) +

high (SS=1)

tsu(EMBAV-EMOEL) Output setup time, EMIFBADD[1:0] valid to

(RS +1) * E -

EMIFOE low

trf(AD) + tf(OE) - 5

trf(AD) + tf(OE) +

th(EMOEH-EMBAIV) Output hold time, EMIFOE high to

(RH +1) * E -

EMIFBADD[1:0] invalid

tr(OE) - 5

tr(OE) + 5

tsu(EMAV-EMOEL)

Output setup time, EMIFADD[21:0] valid to

(RS +1) * E -

EMIFOE low

trf(AD) + tf(OE) - 6

trf(AD) + tf(OE) +

th(EMOEH-EMAIV)

Output hold time, EMIFOE high to EMIFADD[21:0]

(RH +1) * E -

invalid

tr(OE) - 5

tr(OE) + 6

tw(EMOEL)

(3)

EMIFOE active low width

(RST +1) * E -

tf(OE) - 1

tf(OE) + 0

tsu(EMDV-EMOEH)

Setup time, EMIFD[15:0] valid before EMIFOE

tr(OE) + 9

high

th(EMOEH-EMDV)

Hold time, EMIFD[15:0] valid after EMIFOE high

- tr(OE) - 3

Writes

tc(EMWCYCLE)

EMIF write cycle time

(WS + WST +

WH + TA +4) *

E - tf(CS) - 3

E - tf(CS) + 2

tsu(EMCSL-EMWEL) Output setup time, EMIFCS[3:0] low to EMIFWE

(WS +1) * E -

low (SS=0)

tf(CS) + tf(WE) - 5 tf(CS) + tf(WE) + 5

Output setup time, EMIFCS[3:0] low to EMIFWE

- tf(CS) + tf(WE) -

- tf(CS) + tf(WE) +

low (SS=1)

th(EMWEH-EMCSH) Output hold time, EMIFWE high to EMIFCS[3:0]

(WH +1) * E -

high (SS=0)

tr(WE) + tr(CS) - 4

tr(WE) + tr(CS) +

Output hold time, EMIFWE high to EMIFCS[3:0]

- tr(WE) + tr(CS) -

- tr(WE) + tr(CS) +

high (SS=1

tsu(EMBAV-EMWEL) Output setup time, EMIFBADD[1:0] valid to

(WS +1) * E -

EMIFWE low

trf(AD) + tf(WE) - 5

trf(AD) + tf(WE) +

th(EMWEH-EMBAIV) Output hold time, EMIFWE high to EMBADD[1:0]

(WH +1) * E -

invalid

tr(WE) - 5

tr(WE) + 5

tsu(EMAV-EMWEL)

Output setup time, EMIFADD[21:0] valid to

(WS +1) * E -

EMIFWE low

trf(AD) + tf(WE) - 6

trf(AD) + tf(WE) +

(1)

RS = Read setup, RST = Read Strobe, RH = Read Hold, WS = Write Setup, WST = Write Strobe, WH = Write Hold, TA = Turn Around,

SS= Strobe Select Mode

(2)

E = VCLK period in ns.

(3)

Parameters characterized from -40°C to 125°C only.

Peripheral and Electrical Specifications

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