AM5728 datasheet(248/415 Pages) TI1

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248

AM5729, AM5728, AM5726

SPRS953F – DECEMBER 2015 – REVISED MAY 2019

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Timing Requirements and Switching Characteristics

Table 7-28. GPMC/NOR Flash Interface Switching Characteristics - Synchronous Mode -

Alternate (continued)

NO.

PARAMETER

DESCRIPTION

MIN

MAX

UNIT

td(clkH-nCSIV)

Delay time, gpmc_clk rising edge to gpmc_cs[7:0] invalid

E-0.84 (5)

E+6.73

(5)

td(ADDV-clk)

Delay time, gpmc_a[27:0] address bus valid to gpmc_clk first edge

B-1.36 (2)

B+6.73

(2)

td(clkH-ADDIV)

Delay time, gpmc_clk rising edge to gpmc_a[27:0] gpmc address bus invalid

-1.36

td(nBEV-clk)

Delay time, gpmc_ben[1:0] valid to gpmc_clk rising edge

B-6.34 (2)

B+0.6 (2)

td(clkH-nBEIV)

Delay time, gpmc_clk rising edge to gpmc_ben[1:0] invalid

D-0.4 (4) D+4.9 (4)

td(clkH-nADV)

Delay time, gpmc_clk rising edge to gpmc_advn_ale transition

G-0.67 (7) G+6.1 (7)

td(clkH-nADVIV)

Delay time, gpmc_clk rising edge to gpmc_advn_ale invalid

D-0.67 (4) D+6.1 (4)

F10

td(clkH-nOE)

Delay time, gpmc_clk rising edge to gpmc_oen_ren transition

H-0.67 (8)

H+5.65

(8)

F11

td(clkH-nOEIV)

Delay time, gpmc_clk rising edge to gpmc_oen_ren invalid

E-0.67 (5)

E+5.65

(5)

F14

td(clkH-nWE)

Delay time, gpmc_clk rising edge to gpmc_wen transition

I-0.6 (9)

I+6.1 (9)

F15

td(clkH-Data)

Delay time, gpmc_clk rising edge to gpmc_ad[15:0] data bus transition

J-1.76 (10)

J+6.39

(10)

F17

td(clkH-nBE)

Delay time, gpmc_clk rising edge to gpmc_ben[1:0] transition

J-0.6 (10)

J+6.34

(10)

F18

tw(nCSV)

Pulse duration, gpmc_cs[7:0] low

A (10)

F19

tw(nBEV)

Pulse duration, gpmc_ben[1:0] low

C (3)

F20

tw(nADVV)

Pulse duration, gpmc_advn_ale low

K (11)

F23

td(CLK-GPIO)

Delay time, gpmc_clk transition to gpio6_16.clkout1 transition (13)

0.96

6.1

(1) For single read: A = (CSRdOffTime - CSOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK period

For burst read: A = (CSRdOffTime - CSOnTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK period

For burst write: A = (CSWrOffTime - CSOnTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK period

with n the page burst access number.

(2) B = ClkActivationTime * GPMC_FCLK

(3) For single read: C = RdCycleTime * (TimeParaGranularity + 1) * GPMC_FCLK

For burst read: C = (RdCycleTime + (n – 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

For Burst write: C = (WrCycleTime + (n – 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK with n the page burst

access number.

(4) For single read: D = (RdCycleTime – AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

For burst read: D = (RdCycleTime – AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

For burst write: D = (WrCycleTime – AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

(5) For single read: E = (CSRdOffTime – AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

For burst read: E = (CSRdOffTime – AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

For burst write: E = (CSWrOffTime – AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK

(6) For nCS falling edge (CS activated):

Case GpmcFCLKDivider = 0 :

F = 0.5 * CSExtraDelay * GPMC_FCLK Case GpmcFCLKDivider = 1:

F = 0.5 * CSExtraDelay * GPMC_FCLK if (ClkActivationTime and CSOnTime are odd) or (ClkActivationTime and CSOnTime are even)

F = (1 + 0.5 * CSExtraDelay) * GPMC_FCLK otherwise

Case GpmcFCLKDivider = 2:

F = 0.5 * CSExtraDelay * GPMC_FCLK if ((CSOnTime – ClkActivationTime) is a multiple of 3)

F = (1 + 0.5 * CSExtraDelay) * GPMC_FCLK if ((CSOnTime – ClkActivationTime – 1) is a multiple of 3)

F = (2 + 0.5 * CSExtraDelay) * GPMC_FCLK if ((CSOnTime – ClkActivationTime – 2) is a multiple of 3)

Case GpmcFCLKDivider = 3:

F = 0.5 * CSExtraDelay * GPMC_FCLK if ((CSOnTime - ClkActivationTime) is a multiple of 4)

F = (1 + 0.5 * CSExtraDelay) * GPMC_FCLK if ((CSOnTime - ClkActivationTime - 1) is a multiple of 4)

F = (2 + 0.5 * CSExtraDelay) * GPMC_FCLK if ((CSOnTime - ClkActivationTime - 2) is a multiple of 4)

F = (3 + 0.5 * CSExtraDelay) * GPMC_FCLK if ((CSOnTime - ClkActivationTime - 3) is a multiple of 4)

(7) For ADV falling edge (ADV activated):

Case GpmcFCLKDivider = 0 :

G = 0.5 * ADVExtraDelay * GPMC_FCLK

Case GpmcFCLKDivider = 1:

G = 0.5 * ADVExtraDelay * GPMC_FCLK if (ClkActivationTime and ADVOnTime are odd) or (ClkActivationTime and ADVOnTime are

even)

G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK otherwise

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