AM2431BSDGHIALVR. datasheet(162/282 Pages) TI2

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Table 6-59. GPMC and NOR Flash Switching Characteristics – Synchronous Mode (continued)

see Figure 6-39, Figure 6-40, Figure 6-41, Figure 6-42, and Figure 6-43

NO.

PARAMETER

DESCRIPTION

MIN

MAX

UNIT

F20

tw(advnV)

Pulse duration, GPMC0_ADVn_ALE low

K(15)

(1)

Synchronous Mode supports a 32-bit data bus (GPMC0_AD[31:0]) with GPMC0_CLK up to 100MHz and a 16-bit data bus

(GPMC0_AD[15:0]) with GPMC0_CLK up to 133MHz. Select the clock source of GPMC0_FCLK which feeds GPMC0_CLK by writing

to the CTRLMMR_GPMC0_CLKSEL register:

•

133MHz: CLK_SEL = 0h - MAIN_PLL0_HSDIV3_CLKOUT (default)

•

100MHz: CLK_SEL = 1h - MAIN_PLL2_HSDIV3_CLKOUT

(2)

For single read: A = (CSRdOffTime - CSOnTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

For burst read: A = (CSRdOffTime - CSOnTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

For burst write: A = (CSWrOffTime - CSOnTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

With n being the page burst access number.

(3)

Address bus / Byte Enables become valid at start of cycle, GPMC0_CLK activation time may be delayed after start of cycle B =

ClkActivationTime × GPMC0_FCLK(14)

(4)

For single read: C = RdCycleTime × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

For burst read: C = (RdCycleTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

For burst write: C = (WrCycleTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

With n being the page burst access number.

(5)

For single read: D = (RdCycleTime - RdAccessTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

For single write: D = (WrCycleTime - WrAccessTime) × (TimeParaGranularity + 1) × GPMC0_FCLK(14)

For burst read: D = (RdCycleTime - RdAccessTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) ×

GPMC0_FCLK(14)

For burst write: D = (WrCycleTime - WrAccessTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) ×

GPMC0_FCLK(14)

With n being the page burst access number.

(6)

For CSn falling edge (CS activated):

•

Case GPMCFCLKDIVIDER = 0:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14)

•

Case GPMCFCLKDIVIDER = 1:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14) if (ClkActivationTime and CSOnTime are odd) or (ClkActivationTime and

CSOnTime are even)

–

F = (1 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14) if ((CSOnTime - ClkActivationTime) is a multiple of 3)

–

F = (1 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) if ((CSOnTime - ClkActivationTime - 1) is a multiple of 3)

–

F = (2 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) if ((CSOnTime - ClkActivationTime - 2) is a multiple of 3)

For CSn rising edge (CS deactivated) in Reading mode:

•

Case GPMCFCLKDIVIDER = 0:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14)

•

Case GPMCFCLKDIVIDER = 1:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14) if (ClkActivationTime and CSRdOffTime are odd) or (ClkActivationTime and

CSRdOffTime are even)

–

F = (1 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14) if ((CSRdOffTime - ClkActivationTime) is a multiple of 3)

–

F = (1 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) if ((CSRdOffTime - ClkActivationTime - 1) is a multiple of 3)

–

F = (2 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) if ((CSRdOffTime - ClkActivationTime - 2) is a multiple of 3)

For CSn rising edge (CS deactivated) in Writing mode:

•

Case GPMCFCLKDIVIDER = 0:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14)

•

Case GPMCFCLKDIVIDER = 1:

–

F = 0.5 × CSExtraDelay × GPMC0_FCLK(14) if (ClkActivationTime and CSWrOffTime are odd) or (ClkActivationTime and

CSWrOffTime are even)

–

F = (1 + 0.5 × CSExtraDelay) × GPMC0_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

AM2434, AM2432, AM2431

SPRSP65J – APRIL 2021 – REVISED JUNE 2026

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