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www.ti.com SPRS717E –OCTOBER 2011–REVISED JANUARY 2013
Table 5-24. GPMC and NOR Flash Switching Characteristics—Asynchronous Mode (continued)
OPP100 OPP50
NO. PARAMETER UNIT
MIN MAX MIN MAX
FA27 t
d(csnV-wenIV)
Delay time, output chip select gpmc_csn[x]
(13)
F
(6)
– 0.2 F
(6)
+ 2.0 F
(6)
– 0.2 F
(6)
+ 2.0 ns
valid to output write enable gpmc_wen invalid
FA28 t
d(wenV-dV)
Delay time, output write enable gpmc_ wen 2.0 2.0 ns
valid to output data gpmc_ad[15:0] valid
FA29 t
d(dV-csnV)
Delay time, output data gpmc_ad[15:0] valid to J
(9)
– 0.2 J
(9)
+ 2.0 J
(9)
– 0.2 J
(9)
+ 2.0 ns
output chip select gpmc_csn[x]
(13)
valid
FA37 t
d(oenV-aIV)
Delay time, output enable gpmc_oen valid to 2.0 2.0 ns
output address gpmc_ad[15:0] phase end
(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.
Copyright © 2011–2013, Texas Instruments Incorporated Peripheral Information and Timings 133
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