PCIMX258CJM4A datasheet(36/144 Pages) FREESCALE

36 / 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 1.65 V, and 105 °C. Minimum condition for tpr, tpo, and tpv:

bcs model, 1.3 V, I/O 1.95 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 1.65 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 1.95 V, and –40 °C.

4. Maximum condition for tpi and trfi: wcs model, 1.1 V, I/O 1.65 V and 105 °C. Minimum condition for tpi and trfi: bcs model, 1.3 V,

I/O 1.95 V and –40 °C. Input transition time from pad is 5 ns (20%–80%).

Table 24 shows the AC requirements for mobile DDR I/O.

3.6.3.2

DDR_TYPE = 01 SDRAM I/O AC Parameters and Requirements

Table 25 shows AC parameters for SDRAM I/O.

Output pad dI/dt (max. drive)

tdit

25 pF

50 pF

171

183

426

450

mA/ns

Output pad dI/dt (high drive)

tdit

25 pF

50 pF

233

245

mA/ns

Output pad dI/dt (standard drive)

tdit

25 pF

50 pF

115

120

mA/ns

Input pad transition times

trfi

1.0 pF

0.07/0.08

0.11/0.13

0.16/0.20

Input pad propagation delay, 50%–50%

tpi

1.0 pF

0.84/0.84

1.40/1.34

2.25/2.16

Input pad propagation delay, 40%–60%

tpi

1.0 pF

1.66/1.66

2.22/2.16

3.06/2.97

Table 24. AC Requirements for Mobile DDR I/O

Parameter

Symbol

Min.

Max.

Units

AC input logic high

VIH(ac)

0.8

× OVDD

OVDD+0.3

AC input logic low

VIL(ac)

–0.3

0.2

× OVDD

AC differential input voltage

Vid(ac)

0.6

× OVDD

OVDD+0.6

AC differential cross point voltage for input

Vix(ac)

0.4

× OVDD

OVDD+0.6

Table 25. AC Parameters for SDRAM I/O

Parameter

Symbol

Load

Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Notes

Duty cycle

Fduty

—

Clock frequency

—

125

MHz

Table 23. AC Parameters for Mobile DDR pbijtov18_33_ddr_clk I/O (continued)

Parameter

Symbol

Load

Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Notes

PCIMX258CJM4A Datasheet(PDF) 36 Page - Freescale Semiconductor, Inc

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