
SPRS550C
– OCTOBER 2009 – REVISED MARCH 2011
Table 6-4. GPMC/NOR Flash Interface Switching Characteristics Synchronous Mode (continued)
NO.
PARAMETER
1.8V, 3.3V
UNIT
MIN
MAX
F8
td(CLKH-nADV)
Delay time, gpmc_clk rising edge to
G(9) - 1.9
G(9) + 4.1
ns
gpmc_nadv_ale transition
F9
td(CLKH-nADVIV)
Delay time, gpmc_clk rising edge to
D(10) - 1.9
D(10) + 4.1
ns
gpmc_nadv_ale invalid
(9)
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)
(10) For single read: D = (RdCycleTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
For burst read: D = (RdCycleTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
For burst write: D = (WrCycleTime - AccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK
110
TIMING REQUIREMENTS AND SWITCHING CHARACTERISTICS
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2009–2011, Texas Instruments Incorporated