AM3359_12 Datasheet, PDF (121/195 Pages) Texas Instruments – AM335x ARM® Cortex™-A8 Microprocessors (MPUs)

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SPRS717B – OCTOBER 2011 – REVISED JANUARY 2012
Table 5-19. GPMC/NOR Flash Switching Characteristics—Asynchronous Mode (continued)
NO.
FA27 t_{d(csnV-wenIV)}
PARAMETER
Delay time, output chip select gpmc_csn[x]⁽¹³⁾
valid to output write enable gpmc_wen invalid
OPP100
MIN
F⁽⁶⁾ – 0.2
MAX
F⁽⁶⁾ + 2.0
OPP50
MIN
F⁽⁶⁾ – 0.2
MAX
F⁽⁶⁾ + 2.0
UNIT
ns
FA28 t_d(wenV-dV)
FA29 t_d(dV-csnV)
Delay time, output write enable gpmc_ wen
valid to output data gpmc_ad[15:0] valid
Delay time, output data gpmc_ad[15:0] valid to
output chip select gpmc_csn[x]⁽¹³⁾ valid
2.0
2.0 ns
J⁽⁹⁾ – 0.2 J⁽⁹⁾ + 2.0 J⁽⁹⁾ – 0.2 J⁽⁹⁾ + 2.0 ns
FA37 t_d(oenV-aIV)
Delay time, output enable gpmc_oen valid to
output address gpmc_ad[15:0] phase end
2.0
2.0 ns
(1) For single read: A = (CSRdOffTime – CSOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
For single write: A = (CSWrOffTime – CSOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
For burst read: A = (CSRdOffTime – CSOnTime + (n – 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
For burst write: A = (CSWrOffTime – CSOnTime + (n – 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
with n being the page burst access number
(2) For reading: B = ((ADVRdOffTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay – CSExtraDelay)) *
GPMC_FCLK⁽¹⁴⁾
For writing: B = ((ADVWrOffTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay – CSExtraDelay)) *
GPMC_FCLK⁽¹⁴⁾
(3) C = ((OEOffTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay – CSExtraDelay)) * GPMC_FCLK⁽¹⁴⁾
(4) D = PageBurstAccessTime * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
(5) E = ((WEOnTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay – CSExtraDelay)) * GPMC_FCLK⁽¹⁴⁾
(6) F = ((WEOffTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay – CSExtraDelay)) * GPMC_FCLK⁽¹⁴⁾
(7) G = Cycle2CycleDelay * GPMC_FCLK⁽¹⁴⁾
(8) I = ((OEOffTime + (n – 1) * PageBurstAccessTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay – CSExtraDelay)) *
GPMC_FCLK⁽¹⁴⁾
(9) J = (CSOnTime * (TimeParaGranularity + 1) + 0.5 * CSExtraDelay) * GPMC_FCLK⁽¹⁴⁾
(10) K = ((ADVOnTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay – CSExtraDelay)) * GPMC_FCLK⁽¹⁴⁾
(11) L = ((OEOnTime – CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay – CSExtraDelay)) * GPMC_FCLK⁽¹⁴⁾
(12) For single read: N = RdCycleTime * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
For single write: N = WrCycleTime * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
For burst read: N = (RdCycleTime + (n – 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
For burst write: N = (WrCycleTime + (n – 1) * PageBurstAccessTime) * (TimeParaGranularity + 1) * GPMC_FCLK⁽¹⁴⁾
(13) In gpmc_csn[x], x is equal to 0, 1, 2, 3, 4 or 5.
(14) GPMC_FCLK is general-purpose memory controller internal functional clock period in ns.
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