AM5728 datasheet(264/415 Pages) TI1

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264

AM5729, AM5728, AM5726

SPRS953F – DECEMBER 2015 – REVISED MAY 2019

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Timing Requirements and Switching Characteristics

(1) J = AccessTime * (TimeParaGranularity + 1)

Table 7-32. GPMC/NAND Flash Interface Switching Characteristics

NO.

PARAMETER

DESCRIPTION

MIN

MAX

UNIT

tr(DO)

Rising time, gpmc_ad[15:0] output data

0.447

4.067

tf(DO)

Fallling time, gpmc_ad[15:0] output data

0.43

4.463

GNF0

tw(nWEV)

Pulse duration, gpmc_wen valid time

A (1)

GNF1

td(nCSV-nWEV)

Delay time, gpmc_cs[7:0] valid to gpmc_wen valid

B - 2 (2)

B + 4 (2)

GNF2

td(CLEH-nWEV)

Delay time, gpmc_ben[1:0] high to gpmc_wen valid

C - 2 (3)

C + 4 (3)

GNF3

td(nWEV-DV)

Delay time, gpmc_ad[15:0] valid to gpmc_wen valid

D - 2 (4)

D + 4 (4)

GNF4

td(nWEIV-DIV)

Delay time, gpmc_wen invalid to gpmc_ad[15:0] invalid

E - 2 (5)

E + 4 (5)

GNF5

td(nWEIV-CLEIV)

Delay time, gpmc_wen invalid to gpmc_ben[1:0] invalid

F - 2 (6)

F + 4 (6)

GNF6

td(nWEIV-nCSIV)

Delay time, gpmc_wen invalid to gpmc_cs[7:0] invalid

G - 2 (7)

G + 4 (7)

GNF7

td(ALEH-nWEV)

Delay time, gpmc_advn_ale high to gpmc_wen valid

C - 2 (3)

C + 4 (3)

GNF8

td(nWEIV-ALEIV)

Delay time, gpmc_wen invalid to gpmc_advn_ale invalid

F - 2 (6)

F + 4 (6)

GNF9

tc(nWE)

Cycle time, write cycle time

H (8)

GNF10

td(nCSV-nOEV)

Delay time, gpmc_cs[7:0] valid to gpmc_oen_ren valid

I - 2 (9)

I + 4 (9)

GNF13

tw(nOEV)

Pulse duration, gpmc_oen_ren valid time

K (10)

GNF14

tc(nOE)

Cycle time, read cycle time

L (11)

GNF15

td(nOEIV-nCSIV)

Delay time, gpmc_oen_ren invalid to gpmc_cs[7:0] invalid

M - 2 (12)

M + 4 (12)

(1) A = (WEOffTime – WEOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK

(2) B = ((WEOnTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay – CSExtraDelay)) * GPMC_FCLK

(3) C = ((WEOnTime – ADVOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay – ADVExtraDelay)) * GPMC_FCLK

(4) D = (WEOnTime * (TimeParaGranularity + 1) + 0.5 * WEExtraDelay ) * GPMC_FCLK

(5) E = (WrCycleTime – WEOffTime * (TimeParaGranularity + 1) – 0.5 * WEExtraDelay ) * GPMC_FCLK

(6) F = (ADVWrOffTime – WEOffTime * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay – WEExtraDelay) * GPMC_FCLK

(7) G = (CSWrOffTime – WEOffTime * (TimeParaGranularity + 1) + 0.5 * (CSExtraDelay – WEExtraDelay) * GPMC_FCLK

(8) H = WrCycleTime * (1 + TimeParaGranularity) * GPMC_FCLK

(9) I = ((OEOffTime + (n – 1) * PageBurstAccessTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay – CSExtraDelay)) *

GPMC_FCLK

(10) K = (OEOffTime – OEOnTime) * (1 + TimeParaGranularity) * GPMC_FCLK

(11) L = RdCycleTime * (1 + TimeParaGranularity) * GPMC_FCLK

(12) M = (CSRdOffTime – OEOffTime * (TimeParaGranularity + 1) + 0.5 * (CSExtraDelay – OEExtraDelay) * GPMC_FCLK

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