DM385, DM388
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SPRS821D –MARCH 2013–REVISED DECEMBER 2013
8.8.2.3 GPMC/NAND Flash and ELM Interface Timing
Table 8-31. Timing Requirements for GPMC/NAND Flash Interface
(see Figure 8-35)
NO.
OPP100/OPP120/Turbo/Nitr
o
UNIT
MIN
MAX
13 tacc(DAT)
Data maximum access time (GPMC_FCLK cycles)
J(1)
cycles
(1) J = AccessTime * (TimeParaGranularity + 1)
Table 8-32. Switching Characteristics Over Recommended Operating Conditions for GPMC/NAND Flash
Interface
(see Figure 8-33, Figure 8-34, Figure 8-35, Figure 8-36)
OPP100/OPP120/Turbo/Nitr
o
NO.
PARAMETER
UNIT
MIN
MAX
A(1)
1
2
3
4
5
6
7
8
9
tw(nWEV)
Pulse duration, GPMC_WE valid time
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
td(nCSV-nWEV)
td(CLEH-nWEV)
td(nWEV-DV)
Delay time, GPMC_CS[X] valid to GPMC_WE valid
Delay time, GPMC_BE0_CLE high to GPMC_WE valid
Delay time, GPMC_D[15:0] valid to GPMC_WE valid
Delay time, GPMC_WE invalid to GPMC_AD[15:0] invalid
Delay time, GPMC_WE invalid to GPMC_BE0_CLE invalid
Delay time, GPMC_WE invalid to GPMC_CS[X] invalid
Delay time, GPMC_ADV_ALE High to GPMC_WE valid
Delay time, GPMC_WE invalid to GPMC_ADV_ALE invalid
Cycle time, write cycle time
B - 0.2(2)
C - 0.2(3)
D - 0.2(4)
E - 0.2(5)
F - 0.2(6)
G - 0.2(7)
C - 0.2(3)
F - 0.2(6)
B + 2.0(2)
C + 2.0(3)
D + 2.0(4)
E + 2.0(5)
F + 2.0(6)
G + 2.0(7)
C + 2.0(3)
F + 2.0(6)
H(8)
I + 2.0(9)
K(10)
L(11)
M + 2.0(12)
td(nWEIV-DIV)
td(nWEIV-CLEIV)
td(nWEIV-nCSIV)
td(ALEH-nWEV)
td(nWEIV-ALEIV)
10 tc(nWE)
11 td(nCSV-nOEV)
12 tw(nOEV)
Delay time, GPMC_CS[X] valid to GPMC_OE_RE valid
Pulse duration, GPMC_OE_RE valid time
I - 0.2(9)
13 tc(nOE)
Cycle time, read cycle time
14 td(nOEIV-nCSIV)
Delay time, GPMC_OE_RE invalid to GPMC_CS[X] invalid
M - 0.2(12)
(1) A = (WEOffTime - WEOnTime) * (TimeParaGranularity + 1) * GPMC_FCLK
(2) = B + nWE Min Delay - nCS Max Delay
B = ((WEOnTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay - CSExtraDelay)) * GPMC_FCLK
(3) = C + nWE Min Delay - CLE Max Delay
C = ((WEOnTime - ADVOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay - ADVExtraDelay)) * GPMC_FCLK
(4) = D + nWE Min Delay - Data Max Delay
D = (WEOnTime * (TimeParaGranularity + 1) + 0.5 * WEExtraDelay ) * GPMC_FCLK
(5) =E + Data Min Delay - nWE Max Delay
E = ((WrCycleTime - WEOffTime) * (TimeParaGranularity + 1) - 0.5 * WEExtraDelay ) * GPMC_FCLK
(6) = F + CLE Min Delay - nWE Max Delay
F = ((ADVWrOffTime - WEOffTime) * (TimeParaGranularity + 1) + 0.5 * (ADVExtraDelay - WEExtraDelay )) * GPMC_FCLK
(7) =G + nCS Min Delay - nWE Max Delay
G = ((CSWrOffTime - WEOffTime) * (TimeParaGranularity + 1) + 0.5 * (CSExtraDelay - WEExtraDelay )) * GPMC_FCLK
(8) H = WrCycleTime * (1 + TimeParaGranularity) * GPMC_FCLK
(9) = I + nOE Min Delay - nCS Max Delay
I = ((OEOnTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay - CSExtraDelay)) * GPMC_FCLK
(10) K = (OEOffTime - OEOnTime) * (1 + TimeParaGranularity) * GPMC_FCLK
(11) L = RdCycleTime * (1 + TimeParaGranularity) * GPMC_FCLK
(12) =M + nCS Min Delay - nOE Max Delay
M = ((CSRdOffTime - OEOffTime) * (TimeParaGranularity + 1) + 0.5 * (CSExtraDelay - OEExtraDelay ))* GPMC_FCLK
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Peripheral Information and Timings
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