Texas Instruments AM335 Series Technical Reference Manual

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The configuration parameters are calculated through the following formulas.
For single read accesses:
A = (CSRDOFFTIME - CSONTIME) * (TIMEPARAGRANULARITY + 1) * GPMC_FCLK period
C = RDCYCLETIME * (TIMEPARAGRANULARITY + 1) * GPMC_FCLK period
D = (RDCYCLETIME - ACCESSTIME) * GPMC_FCLK period
E = (CSRDOFFTIME - ACCESSTIME) * GPMC_FCLK period
For burst read accesses (where n is the page burst access number):
A = (CSRDOFFTIME - CSONTIME + (n - 1) * PAGEBURSTACCESSTIME) *
(TIMEPARAGRANULARITY + 1) * GPMC_FCLK period
C = (RDCYCLETIME + (n - 1) * PAGEBURSTACCESSTIME) * (TIMEPARAGRANULARITY + 1) *
GPMC_FCLK period
D = (RDCYCLETIME - (ACCESSTIME + (n - 1) * PAGEBURSTACCESSTIME) * GPMC_FCLK period
E = (CSRDOFFTIME - (ACCESSTIME + (n - 1) * PAGEBURSTACCESSTIME) * GPMC_FCLK period
For burst write accesses (where n is the page burst access number):
A = (CSWROFFTIME - CSONTIME + (n - 1) * PAGEBURSTACCESSTIME) *
(TIMEPARAGRANULARITY + 1) * GPMC_FCLK period
C = (WRCYCLETIME + (n - 1) * PAGEBURSTACCESSTIME) * (TIMEPARAGRANULARITY + 1) *
GPMC_FCLK period
D = (WRCYCLETIME - (ACCESSTIME + (n - 1) * PAGEBURSTACCESSTIME) * GPMC_FCLK period
E = (CSWROFFTIME - (ACCESSTIME + (n - 1) * PAGEBURSTACCESSTIME) * GPMC_FCLK period
For all accesses:
For CSn falling edge (CSn activated):
• Case where GPMC_CONFIG1_i[1-0] GPMCFCLKDIVIDER = 0x0
F = 0.5 * CSEXTRADELAY * GPMC_FCLK period
• Case where GPMCFCLKDIVIDER = 0x1
F = 0.5 * CSEXTRADELAY * GPMC_FCLK period, when (CLKACTIVATIONTIME and CSONTIME are
odd) or (CLKACTIVATIONTIME and CSONTIME are even)
F = (1 + 0.5 * CSEXTRADELAY) * GPMC_FCLK period otherwise
• Case where GPMCFCLKDIVIDER = 0x2
F = 0.5 * CSEXTRADELAY * GPMC_FCLK period, when (CSONTIME - CLKACTIVATIONTIME) is a
multiple of 3
F = (1 + 0.5 * CSEXTRADELAY) * GPMC_FCLK period, when (CSONTIME - CLKACTIVATIONTIME -
1) is a multiple of 3
F = (2 + 0.5 * CSEXTRADELAY) * GPMC_FCLK period, when (CSONTIME - CLKACTIVATIONTIME -
2) is a multiple of 3
For CSn rising edge (CSn de-activated) in reading mode:
• Case where GPMC_CONFIG1_i[1-0] GPMCFCLKDIVIDER = 0x0
F = 0.5 * CSEXTRADELAY * GPMC_FCLK period
• Case where GPMCFCLKDIVIDER = 0x1
F = 0.5 * CSEXTRADELAY * GPMC_FCLK period, when (CLKACTIVATIONTIME and CSRDOFFTIME
are odd) or (CLKACTIVATIONTIME and CSRDOFFTIME are even)
F = (1 + 0.5 * CSEXTRADELAY) * GPMC_FCLK period otherwise
• Case where GPMCFCLKDIVIDER = 0x2
F = 0.5 * CSEXTRADELAY * GPMC_FCLK period, when (CSRDOFFTIME - CLKACTIVATIONTIME) is
a multiple of 3
F = (1 + 0.5 * CSEXTRADELAY) * GPMC_FCLK period, when (CSRDOFFTIME -
CLKACTIVATIONTIME - 1) is a multiple of 3
F = (2 + 0.5 * CSEXTRADELAY) * GPMC_FCLK period, when (CSRDOFFTIME -
348
Memory Subsystem SPRUH73H–October 2011–Revised April 2013
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Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English