AM3892 datasheet(217/299 Pages) TI

217 / 299 page

AM3894

AM3892

www.ti.com

SPRS681A – OCTOBER 2010 – REVISED MARCH 2011

Table 8-58. Switching Characteristics Over Recommended Operating Conditions for GPMC/NOR Flash

Interface - Asynchronous Mode (continued)

(see Figure 8-57, Figure 8-58, Figure 8-59, Figure 8-60, Figure 8-61, Figure 8-62)

NO.

PARAMETER

MIN

MAX

UNIT

td(nCSV-DIR)

Delay time, GPMC_CS[x] valid to GPMC_DIR high

L - 0.2(7)

L + 2.0(7)

td(nCSV-DIR)

Delay time, GPMC_CS[x] valid to GPMC_DIR low

M - 0.2(8)

M + 2.0(8)

tw(AIV)

Address invalid duration between 2 successive R/W accesses

G(9)

Delay time, GPMC_CS[x] valid to GPMC_OE_RE invalid (burst

td(nCSV-nOEIV)

I - 0.2(10)

I + 2.0(10)

read)

tw(AV)

Pulse duration, address valid: second, third and fourth accesses

D(11)

td(nCSV-nWEV)

Delay time, GPMC_CS[x] valid to GPMC_WE valid

E - 0.2(12)

E + 2.0(12)

td(nCSV-nWEIV)

Delay time, GPMC_CS[x] valid to GPMC_WE invalid

F - 0.2(13)

F + 2.0(13)

td(nWEV-DV)

Delay time, GPMC_WE valid to data bus valid

2.0

td(DV-nCSV)

Delay time, data bus valid to GPMC_CS[x] valid

J - 0.2(5)

J + 2.0(5)

Delay time, GPMC_OE_RE valid to GPMC_A[16:1]_D[15:0]

td(nOEV-AIV)

2.0

address phase end

(8)

= M - nCS Max Delay + nOE Min Delay

M = ((RdCycleTime - CSOnTime) * (TimeParaGranularity + 1) - 0.5 * CSExtraDelay) * GPMC_FCLK.

Parameter M expression is given as one example of GPMC programming. The IO DIR signal goes from IN to OUT after both

RdCycleTime and BusTurnAround completion. Behavior of the IO direction signal depends on the kind of successive read/write

accesses performed to the memory and multiplexed or non-multiplexed memory addressing scheme, whether the bus keeping feature is

enabled or not. The IO DIR behavior is automatically handled by the GPMC controller.

(9)

G = Cycle2CycleDelay * GPMC_FCLK

(10) = I - nCS Max Delay + nOE Min Delay

I = ((OEOffTime + (n - 1) * PageBurstAccessTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (OEExtraDelay - CSExtraDelay)) *

GPMC_FCLK

(11) D = PageBurstAccessTime * (TimeParaGranularity + 1) * GPMC_FCLK

(12) = E - nCS Max Delay + nWE Min Delay

E = ((WEOnTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay - CSExtraDelay)) * GPMC_FCLK

(13) = F - nCS Max Delay + nWE Min Delay

F = ((WEOffTime - CSOnTime) * (TimeParaGranularity + 1) + 0.5 * (WEExtraDelay - CSExtraDelay)) * GPMC_FCLK

Peripheral Information and Timings

217

Submit Documentation Feedback

Product Folder Link(s): AM3894 AM3892

AM3892 Datasheet(PDF) 217 Page - Texas Instruments

AM3892 Datasheet(HTML) 217 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL