AM6421 datasheet(146/237 Pages) TI

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7.10.5.8 GPMC

For more details about features and additional description information on the device General-Purpose Memory

Controller, see the corresponding sections within Section 6.3, Signal Descriptions and Section 8, Detailed

Description.

7.10.5.8.1 GPMC and NOR Flash — Synchronous Mode

Section 7.10.5.8.1.1 and Section 7.10.5.8.1.2 assume testing over the recommended operating conditions and

electrical characteristic conditions below (see Figure 7-37 through Figure 7-41).

7.10.5.8.1.1 GPMC and NOR Flash Timing Requirements — Synchronous Mode

NO.

PARAMETER

DESCRIPTION

MODE

(2)

MIN

MAX

MIN

MAX

UNIT

100 MHz

133 MHz

F12 tsu(dV-clkH)

Setup time, input data

GPMC_AD[15:0] valid before output

clock GPMC_CLK high

div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.81

1.11

not_div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.06

3.50

F13 th(clkH-dV)

Hold time, input data

GPMC_AD[15:0] valid after output

clock GPMC_CLK high

div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.78

2.28

not_div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.78

F21 tsu(waitV-clkH)

Setup time, input wait

GPMC_WAIT[j] valid before output

clock GPMC_CLK high

(1)

div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.81

1.11

not_div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.06

3.50

F22 th(clkH-waitV)

Hold time, input wait

GPMC_WAIT[j] valid after output

clock GPMC_CLK high

(1)

div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.78

2.28

not_div_by_1_mode;

GPMC_FCLK_MUX;

TIMEPARAGRANULARITY_X1

1.78

(1)

In GPMC_WAIT[j], j is equal to 0 or 1.

(2)

For div_by_1_mode:

•

GPMC_CONFIG1_i Register: GPMCFCLKDIVIDER = 0h:

–

GPMC_CLK frequency = GPMC_FCLK frequency

For not_div_by_1_mode:

•

GPMC_CONFIG1_i Register: GPMCFCLKDIVIDER = 1h to 3h:

–

GPMC_CLK frequency = GPMC_FCLK frequency / (2 to 4)

For GPMC_FCLK_MUX:

•

CTRLMMR_GPMC_CLKSEL[1-0] CLK_SEL = 01 = PER1_PLL_CLKOUT / 3 = 300 / 3 = 100MHz

For TIMEPARAGRANULARITY_X1:

•

GPMC_CONFIG1_i Register: TIMEPARAGRANULARITY = 0h = x1 latencies (affecting RD/WRCYCLETIME, RD/

WRACCESSTIME, PAGEBURSTACCESSTIME, CSONTIME, CSRD/WROFFTIME, ADVONTIME, ADVRD/WROFFTIME,

OEONTIME, OEOFFTIME, WEONTIME, WEOFFTIME, CYCLE2CYCLEDELAY, BUSTURNAROUND, TIMEOUTSTARTVALUE,

WRDATAONADMUXBUS)

AM6442, AM6441, AM6421

AM6412, AM6411

SPRSP56 – JANUARY 2021

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