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SPRS717J – OCTOBER 2011 – REVISED APRIL 2016
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Peripheral Information and Timings
Copyright © 2011–2016, Texas Instruments Incorporated
7.7.1.3
GPMC and NAND Flash—Asynchronous Mode
and
assume testing over the recommended operating conditions and electrical
characteristic conditions shown in
(see
through
Table 7-27. GPMC and NAND Flash Timing Conditions—Asynchronous Mode
PARAMETER
MIN
TYP
MAX
UNIT
Input Conditions
t
R
Input signal rise time
1
5
ns
t
F
Input signal fall time
1
5
ns
Output Condition
C
LOAD
Output load capacitance
3
30
pF
Table 7-28. GPMC and NAND Flash Internal Timing Requirements—Asynchronous Mode
NO.
OPP100
OPP50
UNIT
MIN
MAX
MIN
MAX
GNFI1
Delay time, output data gpmc_ad[15:0] generation from internal
functional clock GPMC_FCLK
6.5
6.5
ns
GNFI2
Delay time, input data gpmc_ad[15:0] capture from internal functional
clock GPMC_FCLK
4.0
4.0
ns
GNFI3
Delay time, output chip select gpmc_csn[x] generation from internal
functional clock GPMC_FCLK
6.5
6.5
ns
GNFI4
Delay time, output address valid and address latch enable
gpmc_advn_ale generation from internal functional clock
GPMC_FCLK
6.5
6.5
ns
GNFI5
Delay time, output lower-byte enable and command latch enable
gpmc_be0n_cle generation from internal functional clock
GPMC_FCLK
6.5
6.5
ns
GNFI6
Delay time, output enable gpmc_oen generation from internal functional
clock GPMC_FCLK
6.5
6.5
ns
GNFI7
Delay time, output write enable gpmc_wen generation from internal
functional clock GPMC_FCLK
6.5
6.5
ns
GNFI8
Skew, functional clock GPMC_FCLK
100
100
ps
(1) Internal parameters table must be used to calculate data access time stored in the corresponding CS register bit field.
(2) Internal parameters are referred to the GPMC functional internal clock which is not provided externally.
(3) GPMC_FCLK is general-purpose memory controller internal functional clock.
Table 7-29. GPMC and NAND Flash Timing Requirements—Asynchronous Mode
NO.
OPP100
OPP50
UNIT
MIN
MAX
MIN
MAX
GNF12
t
acc(d)
Access time, input data gpmc_ad[15:0]
J
ns
(1) The GNF12 parameter illustrates the amount of time required to internally sample input data. It is expressed in number of GPMC
functional clock cycles. From start of the read cycle and after GNF12 functional clock cycles, input data is internally sampled by the
active functional clock edge. The GNF12 value must be stored inside AccessTime register bit field.
(2) J = AccessTime × (TimeParaGranu 1) × GPMC_FCLK
(3) GPMC_FCLK is general-purpose memory controller internal functional clock period in ns.