AM4376 datasheet(151/261 Pages) TI

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AM4376, AM4377, AM4378, AM4379

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SPRS851B – JUNE 2014 – REVISED APRIL 2015

Table 5-40. GPMC and NOR Flash Switching Characteristics—Synchronous Mode(2) (continued)

OPP100

OPP50

NO.

PARAMETER

UNIT

MIN

MAX

MIN

MAX

F18

tw(csnV)

Pulse duration, output chip select

Read

A(1)

gpmc_csn[x](14) low

Write

A(1)

F19

tw(be[x]nV)

Pulse duration, output lower byte enable

Read

C(3)

and command latch enable

Write

C(3)

gpmc_be0n_cle, output upper byte enable

gpmc_be1n low

F20

tw(advnV)

Pulse duration, output address valid and

Read

K(16)

address latch enable gpmc_advn_ale low

Write

K(16)

(1) For single read: A = (CSRdOffTime - CSOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst read: A = (CSRdOffTime - CSOnTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst write: A = (CSWrOffTime - CSOnTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

With n being the page burst access number.

(2) B = ClkActivationTime * GPMC_FCLK(17)

(3) For single read: C = RdCycleTime * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst read: C = (RdCycleTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst write: C = (WrCycleTime + (n - 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

With n being the page burst access number.

(4) For single read: D = (RdCycleTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst read: D = (RdCycleTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst write: D = (WrCycleTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

(5) For single read: E = (CSRdOffTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst read: E = (CSRdOffTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

For burst write: E = (CSWrOffTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK(17)

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

–

Case GpmcFCLKDivider = 0:

–

F = 0.5 * CSExtraDelay * GPMC_FCLK(17)

–

Case GpmcFCLKDivider = 1:

–

F = 0.5 * CSExtraDelay * GPMC_FCLK(17) if (ClkActivationTime and CSOnTime are odd) or (ClkActivationTime and CSOnTime

are even)

–

F = (1 + 0.5 * CSExtraDelay) * GPMC_FCLK(17) otherwise

–

Case GpmcFCLKDivider = 2:

–

F = 0.5 * CSExtraDelay * GPMC_FCLK(17) if ((CSOnTime - ClkActivationTime) is a multiple of 3)

–

F = (1 + 0.5 * CSExtraDelay) * GPMC_FCLK(17) if ((CSOnTime - ClkActivationTime - 1) is a multiple of 3)

–

F = (2 + 0.5 * CSExtraDelay) * GPMC_FCLK(17) if ((CSOnTime - ClkActivationTime - 2) is a multiple of 3)

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

–

Case GpmcFCLKDivider = 0:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17)

–

Case GpmcFCLKDivider = 1:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17) if (ClkActivationTime and ADVOnTime are odd) or (ClkActivationTime and

ADVOnTime are even)

–

G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK(17) otherwise

–

Case GpmcFCLKDivider = 2:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17) if ((ADVOnTime - ClkActivationTime) is a multiple of 3)

–

G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK(17) if ((ADVOnTime - ClkActivationTime - 1) is a multiple of 3)

–

G = (2 + 0.5 * ADVExtraDelay) * GPMC_FCLK(17) if ((ADVOnTime - ClkActivationTime - 2) is a multiple of 3)

For ADV rising edge (ADV deactivated) in Reading mode:

–

Case GpmcFCLKDivider = 0:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17)

–

Case GpmcFCLKDivider = 1:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17) if (ClkActivationTime and ADVRdOffTime are odd) or (ClkActivationTime and

ADVRdOffTime are even)

–

G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK(17) otherwise

–

Case GpmcFCLKDivider = 2:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17) if ((ADVRdOffTime - ClkActivationTime) is a multiple of 3)

–

G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK(17) if ((ADVRdOffTime - ClkActivationTime - 1) is a multiple of 3)

–

G = (2 + 0.5 * ADVExtraDelay) * GPMC_FCLK(17) if ((ADVRdOffTime - ClkActivationTime - 2) is a multiple of 3)

For ADV rising edge (ADV deactivated) in Writing mode:

–

Case GpmcFCLKDivider = 0:

–

G = 0.5 * ADVExtraDelay * GPMC_FCLK(17)

–

Case GpmcFCLKDivider = 1:

Specifications

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