AM3892 Datasheet, PDF (210/299 Pages) Texas Instruments – AM389x Sitara ARM Microprocessors (MPUs)

AM3894
AM3892
SPRS681A – OCTOBER 2010 – REVISED MARCH 2011
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Table 8-55. Switching Characteristics Over Recommended Operating Conditions for GPMC/NOR Flash
Interface - Synchronous Mode (continued)
(see Figure 8-51, Figure 8-52, Figure 8-53, Figure 8-54, Figure 8-55, Figure 8-56)
NO.
PARAMETER
9 t_d(CLKH-nADV)
10 t_{d(CLKH-nADVIV)}
11 t_d(CLKH-nOE)
12 t_{d(CLKH-nOEIV)}
Delay time, GPMC_CLK rising edge to GPMC_ADV_ALE transition
Delay time, GPMC_CLK rising edge to GPMC_ADV_ALE invalid
Delay time, GPMC_CLK rising edge to GPMC_OE_RE transition
Delay time, GPMC_CLK rising edge to GPMC_OE_RE invalid
MIN
G - 2.3⁽⁷⁾
D - 2.3⁽⁶⁾
H - 2.3⁽⁸⁾
E - 2.3⁽⁴⁾
MAX
G + 4.5⁽⁷⁾
D + 4.5⁽⁶⁾
H + 3.5⁽⁸⁾
E + 3.5⁽⁴⁾
UNIT
ns
ns
ns
ns
(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
• Case GpmcFCLKDivider = 2:
G = 0.5 * ADVExtraDelay * GPMC_FCLK if ((ADVOnTime - ClkActivationTime) is a multiple of 3)
G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK if ((ADVOnTime - ClkActivationTime - 1) is a multiple of 3)
G = (2 + 0.5 * ADVExtraDelay) * GPMC_FCLK 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
• Case GpmcFCLKDivider = 1:
G = 0.5 * ADVExtraDelay * GPMC_FCLK if (ClkActivationTime and ADVRdOffTime are odd) or (ClkActivationTime and
ADVRdOffTime are even)
G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK otherwise
• Case GpmcFCLKDivider = 2:
G = 0.5 * ADVExtraDelay * GPMC_FCLK if ((ADVRdOffTime - ClkActivationTime) is a multiple of 3)
G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK if ((ADVRdOffTime - ClkActivationTime - 1) is a multiple of 3)
G = (2 + 0.5 * ADVExtraDelay) * GPMC_FCLK 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
• Case GpmcFCLKDivider = 1:
G = 0.5 * ADVExtraDelay * GPMC_FCLK if (ClkActivationTime and ADVWrOffTime are odd) or (ClkActivationTime and
ADVWrOffTime are even)
G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK otherwise
• Case GpmcFCLKDivider = 2:
G = 0.5 * ADVExtraDelay * GPMC_FCLK if ((ADVWrOffTime - ClkActivationTime) is a multiple of 3)
G = (1 + 0.5 * ADVExtraDelay) * GPMC_FCLK if ((ADVWrOffTime - ClkActivationTime - 1) is a multiple of 3)
G = (2 + 0.5 * ADVExtraDelay) * GPMC_FCLK if ((ADVWrOffTime - ClkActivationTime - 2) is a multiple of 3)
(8) For OE falling edge (OE activated) / IO DIR rising edge (IN direction) :
• Case GpmcFCLKDivider = 0:
H = 0.5 * OEExtraDelay * GPMC_FCLK
• Case GpmcFCLKDivider = 1:
H = 0.5 * OEExtraDelay * GPMC_FCLK if (ClkActivationTime and OEOnTime are odd) or (ClkActivationTime and OEOnTime are
even)
H = (1 + 0.5 * OEExtraDelay) * GPMC_FCLK otherwise
• Case GpmcFCLKDivider = 2:
H = 0.5 * OEExtraDelay * GPMC_FCLK if ((OEOnTime - ClkActivationTime) is a multiple of 3)
H = (1 + 0.5 * OEExtraDelay) * GPMC_FCLK if ((OEOnTime - ClkActivationTime - 1) is a multiple of 3)
H = (2 + 0.5 * OEExtraDelay) * GPMC_FCLK if ((OEOnTime - ClkActivationTime - 2) is a multiple of 3)
For OE rising edge (OE deactivated):
• Case GpmcFCLKDivider = 0:
H = 0.5 * OEExtraDelay * GPMC_FCLK
• Case GpmcFCLKDivider = 1:
H = 0.5 * OEExtraDelay * GPMC_FCLK if (ClkActivationTime and OEOffTime are odd) or (ClkActivationTime and OEOffTime are
even)
H = (1 + 0.5 * OEExtraDelay) * GPMC_FCLK otherwise
• Case GpmcFCLKDivider = 2:
H = 0.5 * OEExtraDelay * GPMC_FCLK if ((OEOffTime - ClkActivationTime) is a multiple of 3)
H = (1 + 0.5 * OEExtraDelay) * GPMC_FCLK if ((OEOffTime - ClkActivationTime - 1) is a multiple of 3)
H = (2 + 0.5 * OEExtraDelay) * GPMC_FCLK if ((OEOffTime - ClkActivationTime - 2) is a multiple of 3)
210 Peripheral Information and Timings
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