GPMC_FCLK
GPMC_CLK
Valid address
Valid address Data
nBE1/nBE0
nCS
nADV
nWE
A
A/D
DIR
OUT
A
N
B
K
J
J
J
E
F
GPMC
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H = ((OEOFFTIME - ACCESSTIME) * (TIMEPARAGRANULARITY + 1) + 0.5 * OEEXTRADELAY) *
GPMC_FCLK period
I = ((OEOFFTIME + (N - 1) * PAGEBURSTACCESSTIME - CSONTIME) * (TIMEPARAGRANULARITY +
1) + 0.5 * (OEEXTRADELAY - CSEXTRADELAY)) * GPMC_FCLK period, where N = page burst access
number
J = (CSONTIME * (TIMEPARAGRANULARITY + 1) + 0.5 * CSEXTRADELAY) * GPMC_FCLK period
K = ((ADVONTIME - CSONTIME) * (TIMEPARAGRANULARITY + 1) + 0.5 * (ADVEXTRADELAY -
CSEXTRADELAY)) * GPMC_FCLK period
L = ((OEONTIME - CSONTIME) * (TIMEPARAGRANULARITY + 1) + 0.5 * (OEEXTRADELAY -
CSEXTRADELAY)) * GPMC_FCLK period M = ((ACCESSTIME - CSONTIME) *
(TIMEPARAGRANULARITY + 1) - 0.5 * CSEXTRADELAY) * GPMC_FCLK period
GPMC_BE0n_CLE/GPMC_BE1n pulse:
For single read: N = RDCYCLETIME * (TIMEPARAGRANULARITY + 1) * GPMC_FCLK period
For burst read: N = (RDCYCLETIME + (N - 1) * PAGEBURSTACCESSTIME) *
(TIMEPARAGRANULARITY + 1) * GPMC_FCLK period, where N = page burst access number
For burst write: N = (WRCYCLETIME + (N - 1) * PAGEBURSTACCESSTIME) *
(TIMEPARAGRANULARITY + 1) * GPMC_FCLK period, where N = page burst access number
O = ((WRCYCLETIME + (N - 1) * PAGEBURSTACCESSTIME - CSONTIME) *
(TIMEPARAGRANULARITY + 1) + 0.5 * (ADVEXTRADELAY - CSEXTRADELAY)) * GPMC_FCLK period
Figure 7-46 shows an asynchronous NOR single write simplified example where formulas are associated
with signal waves.
Figure 7-46. Asynchronous NOR Single Write Simplified Example
Write multiple access is not supported in asynchronous mode. If WRITEMULTIPLE is enabled with
WRITETYPE as asynchronous, the GPMC processes single asynchronous accesses.
354
Memory Subsystem SPRUH73H–October 2011–Revised April 2013
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