AM625 datasheet(149/255 Pages) TI

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•

Case GPMCFCLKDIVIDER = 0:

–

H = 0.5 × OEExtraDelay × GPMC_FCLK(14)

•

Case GPMCFCLKDIVIDER = 1:

–

H = 0.5 × OEExtraDelay × GPMC_FCLK(14) if (ClkActivationTime and OEOnTime are odd) or (ClkActivationTime and

OEOnTime are even)

–

H = (1 + 0.5 × OEExtraDelay) × GPMC_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

–

H = 0.5 × OEExtraDelay × GPMC_FCLK(14) if ((OEOnTime - ClkActivationTime) is a multiple of 3)

–

H = (1 + 0.5 × OEExtraDelay) × GPMC_FCLK(14) if ((OEOnTime - ClkActivationTime - 1) is a multiple of 3)

–

H = (2 + 0.5 × OEExtraDelay) × GPMC_FCLK(14) if ((OEOnTime - ClkActivationTime - 2) is a multiple of 3)

For OE rising edge (OE deactivated):

•

Case GPMCFCLKDIVIDER = 0:

–

H = 0.5 × OEExtraDelay × GPMC_FCLK(14)

•

Case GPMCFCLKDIVIDER = 1:

–

H = 0.5 × OEExtraDelay × GPMC_FCLK(14) if (ClkActivationTime and OEOffTime are odd) or (ClkActivationTime and

OEOffTime are even)

–

H = (1 + 0.5 × OEExtraDelay) × GPMC_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

–

H = 0.5 × OEExtraDelay × GPMC_FCLK(14) if ((OEOffTime - ClkActivationTime) is a multiple of 3)

–

H = (1 + 0.5 × OEExtraDelay) × GPMC_FCLK(14) if ((OEOffTime - ClkActivationTime - 1) is a multiple of 3)

–

H = (2 + 0.5 × OEExtraDelay) × GPMC_FCLK(14) if ((OEOffTime - ClkActivationTime - 2) is a multiple of 3)

(8)

For WE falling edge (WE activated):

•

Case GPMCFCLKDIVIDER = 0:

–

I = 0.5 × WEExtraDelay × GPMC_FCLK(14)

•

Case GPMCFCLKDIVIDER = 1:

–

I = 0.5 × WEExtraDelay × GPMC_FCLK(14) if (ClkActivationTime and WEOnTime are odd) or (ClkActivationTime and

WEOnTime are even)

–

I = (1 + 0.5 × WEExtraDelay) × GPMC_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

–

I = 0.5 × WEExtraDelay × GPMC_FCLK(14) if ((WEOnTime - ClkActivationTime) is a multiple of 3)

–

I = (1 + 0.5 × WEExtraDelay) × GPMC_FCLK(14) if ((WEOnTime - ClkActivationTime - 1) is a multiple of 3)

–

I = (2 + 0.5 × WEExtraDelay) × GPMC_FCLK(14) if ((WEOnTime - ClkActivationTime - 2) is a multiple of 3)

For WE rising edge (WE deactivated):

•

Case GPMCFCLKDIVIDER = 0:

–

I = 0.5 × WEExtraDelay × GPMC_FCLK (14)

•

Case GPMCFCLKDIVIDER = 1:

–

I = 0.5 × WEExtraDelay × GPMC_FCLK(14) if (ClkActivationTime and WEOffTime are odd) or (ClkActivationTime and

WEOffTime are even)

–

I = (1 + 0.5 × WEExtraDelay) × GPMC_FCLK(14) otherwise

•

Case GPMCFCLKDIVIDER = 2:

–

I = 0.5 × WEExtraDelay × GPMC_FCLK(14) if ((WEOffTime - ClkActivationTime) is a multiple of 3)

–

I = (1 + 0.5 × WEExtraDelay) × GPMC_FCLK(14) if ((WEOffTime - ClkActivationTime - 1) is a multiple of 3)

–

I = (2 + 0.5 × WEExtraDelay) × GPMC_FCLK(14) if ((WEOffTime - ClkActivationTime - 2) is a multiple of 3)

(9)

J = GPMC_FCLK(14)

(10) First transfer only for CLK DIV 1 mode.

(11) Half cycle; for all data after initial transfer for CLK DIV 1 mode.

(12) Half cycle of GPMC_CLKOUT; for all data for modes other than CLK DIV 1 mode. GPMC_CLKOUT divide down from GPMC_FCLK.

(13) In GPMC_CSn[i], i is equal to 0, 1, 2 or 3. In GPMC_WAIT[j], j is equal to 0 or 1.

(14) P = GPMC_CLK period in ns

(15) Related to the GPMC_CLK output clock maximum and minimum frequencies programmable in the GPMC module by setting the

GPMC_CONFIG1_i configuration register bit field GPMCFCLKDIVIDER.

(16) For div_by_1_mode:

•

GPMC_CONFIG1_i register: GPMCFCLKDIVIDER = 0h:

–

GPMC_CLK frequency = GPMC_FCLK frequency

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AM625, AM623

SPRSP58A – JUNE 2022 – REVISED NOVEMBER 2022

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