PCIMX258CJM4A datasheet(38/144 Pages) FREESCALE

38 / 144 page

i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3

Freescale Semiconductor

Note:

1. Maximum condition for tpr, tpo, tpi, and tpv: wcs model, 1.1 V, I/O 3.0 V, and 105 °C. Minimum condition for tpr, tpo, and tpv:

bcs model, 1.3 V, I/O 3.6 V and –40 °C. Input transition time from core is 1 ns (20%–80%).

2. Minimum condition for tps: wcs model, 1.1 V, I/O 3.0 V, and 105 °C. tps is measured between VIL to VIH for rising edge and

between VIH to VIL for falling edge.

3. Maximum condition for tdit: bcs model, 1.3 V, I/O 3.6 V, and –40 °C.

4. Maximum condition for tpi and trfi: wcs model, 1.1 V, I/O 3.0 V and 105 °C. Minimum condition for tpi and trfi: bcs model, 1.3 V,

I/O 3.6 V and –40 °C. Input transition time from pad is 5 ns (20%–80%).

Table 26 shows AC parameters for SDRAM pbijtov18_33_ddr_clk I/O.

Output pad dI/dt (max. drive)

tdit

25 pF

50 pF

198

209

398

421

mA/ns

Output pad dI/dt (high drive)

tdit

25 pF

50 pF

132

139

265

279

mA/ns

Output pad dI/dt (standard drive)

tdit

25 pF

50 pF

132

139

mA/ns

Input pad transition times

trfi

1.0 pF

0.07/0.08

0.11/0.12

0.16/0.20

Input pad propagation delay, 50%–50%

tpi

1.0 pF

0.35/1.17

0.63/1.53

1.16/2.04

Input pad propagation delay, 40%–60%

tpi

—

1.18/1.99

1.45/2.35

1.97/2.85

—

Table 26. AC Parameters for SDRAM pbijtov18_33_ddr_clk I/O

Parameter

Symbol

Load

Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Notes

Duty cycle

Fduty

—

Clock frequency

—

125

MHz

Output pad transition times (max. drive)

tpr

25 pF

50 pF

0.82/0.87

1.56/1.67

1.14/1.13

2.13/2.09

1.62/1.50

3.015/2.7

Output pad transition times (high drive)

tpr

25 pF

50 pF

1.23/1.31

2.31/2.47

1.71/1.68

3.22/3.12

2.39/2.22

4.53/4.16

Output pad transition times (standard drive)

tpr

25 pF

50 pF

2.44/2.60

4.65/4.99

3.38/3.27

6.38/6.23

4.73/4.38

9.05/8.23

Output pad propagation delay (max. drive),

50%–50% input signals and crossing of

output signals

tpo

15 pF

35 pF

1.50/1.40

1.95/1.85

2.23/2.07

2.81/2.66

3.28/3.04

4.06/3.82

Output pad propagation delay (high drive),

50%–50% input signals and crossing of

output signals

tpo

15 pF

35 pF

1.69/1.59

2.35/2.25

2.48/2.32

3.35/3.19

3.63/3.38

4.80/4.56

Output pad propagation delay (standard

drive), 50%–50% input signals and crossing

of output signals

tpo

15 pF

35 pF

2.26/2.15

3.59/3.49

3.24/3.08

4.98/4.82

4.66/4.42

7.00/6.75

Table 25. AC Parameters for SDRAM I/O (continued)

Parameter

Symbol

Load

Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Notes

PCIMX258CJM4A Datasheet(PDF) 38 Page - Freescale Semiconductor, Inc

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