AM3871 datasheet(239/345 Pages) TI1

239 / 345 page

AM3874, AM3872, AM3871

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SPRS695

– SEPTEMBER 2011

Table 8-35. Switching Characteristics Over Recommended Operating Conditions for GPMC/NOR Flash

Interface - Asynchronous Mode (continued)

(see Figure 8-27, Figure 8-28, Figure 8-29, Figure 8-30 for Non-Multiplexed Modes)

(see Figure 8-31, Figure 8-32 for Multiplexed Modes)

OPP100

PARAMETER

UNIT

MIN

MAX

td(nCSV-nOEIV)

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

I - 2(9)

I + 4(9)

MUX0 and Non-Multi

D(10)

Muxed pins

MUX1 for

D(10)

Pulse duration, GPMC_A[27:0] address bus valid:

GPMC_A[15:0]

tw(AV)

second, third and fourth accesses

MUX1/2 for

D(10)

GPMC_A[27:20]

GPMC_D[15:0]

D(10)

td(nCSV-nWEV)

Delay time, GPMC_CS[x] valid to GPMC_WE valid

E - 2(11)

E + 4(11)

td(nCSV-nWEIV)

Delay time, GPMC_CS[x] valid to GPMC_WE invalid

F - 2(12)

F + 4(12)

td(nWEV-DV)

Delay time, GPMC_WE valid to GPMC_D[15:0] data bus valid

2.0

td(DV-nCSV)

Delay time, GPMC_D[15:0] data bus valid to GPMC_CS[x] valid

J - 2(5)

J + 4(5)

Delay time, GPMC_ADV_ALE valid to GPMC_D[15:0]

MUX0 and Non-Multi

37? td(ADVV-AIV)

2.0

address invalid

Muxed pins

MUX0 and Non-Multi

2.0

Muxed pins

MUX1 for

2.0

Delay time, GPMC_OE_RE valid to GPMC_D[15:0]

GPMC_A[15:0]

td(nOEV-AIV)

address/data busses phase end

MUX1/2 for

2.0

GPMC_A[27:20]

GPMC_D[15:0]

2.0

MUX0 and Non-Multi

39? td(AIV-ADVV)

Delay time, GPMC_ ???

2.0

Muxed pins

(9)

= I - nCS Max Delay + nOE Min Delay

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

GPMC_FCLK

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

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

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

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

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

Peripheral Information and Timings

239

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