IMX53IEC datasheet(38/173 Pages) FREESCALE

38 / 173 page

i.MX53 Applications Processors for Industrial Products, Rev. 6

Freescale Semiconductor

Electrical Characteristics

4.5.2

LPDDR2 I/O AC Electrical Characteristics

The DDR2/LVDDR2 interface mode fully complies with JESD79-2E DDR2 JEDEC standard release

April, 2008. The DDR3 interface mode fully complies with JESD79-3D DDR3 JEDEC standard release

April, 2008.

Table 22 shows the AC parameters for LPDDR2 I/O operating in DDR2 mode.

Output Pad Transition Times (Low Drive)

tr, tf

15 pF

35 pF

—

4.82/4.5

10.54/9.95

Output Pad Slew Rate (Max Drive)1

tps

15 pF

35 pF

0.69/0.78

0.36/0.39

——

V/ns

Output Pad Slew Rate (High Drive)1

tps

15 pF

35 pF

0.55/0.62

0.28/0.30

——

V/ns

Output Pad Slew Rate (Medium Drive)1

tps

15 pF

35 pF

0.39/0.44

0.19/0.20

——

V/ns

Output Pad Slew Rate (Low Drive)1

tps

15 pF

35 pF

0.21/0.22

0.09/0.1

——

V/ns

Output Pad di/dt (Max Drive)

tdit

—

mA/ns

Output Pad di/dt (High Drive)

tdit

—

mA/ns

Output Pad di/dt (Medium drive)

tdit

—

mA/ns

Output Pad di/dt (Low drive)

tdit

—

mA/ns

Input Transition Times2

trm

—

1 tps is measured between VIL to VIH for rising edge and between VIH to VIL for falling edge.

2 Hysteresis mode is recommended for inputs with transition time greater than 25 ns.

Table 22. LPDDR2 I/O DDR2 mode AC Characteristics1

1 Note that the JEDEC SSTL_18 specification (JESD8-15a) for class II operation supersedes any specification in this

document.

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

AC input logic high

Vih(ac)

—

Vref+0.25

—

AC input logic low

Vil(ac)

—

Vref-0.25

AC differential input voltage2

Vid(ac)

—

0.5

—

OVDD

Input AC differential cross point voltage3

Vix(ac)

—

Vref - 0.175

—

Vref + 0.175

Output AC differential cross point voltage4

Vox(ac)

—

Vref - 0.125

—

Vref + 0.125

Single output slew rate

tsr

At 25 W to Vref

0.4

—

V/ns

Skew between pad rise/fall asymmetry +

skew caused by SSN

tSKD

clk = 266 MHz

clk = 400 MHz

——

0.2

0.1

Table 21. GPIO I/O AC Parameters Fast Mode (continued)

Parameter

Symbol

Test

Condition

Min

Typ

Max

Unit

IMX53IEC Datasheet(PDF) 38 Page - Freescale Semiconductor, Inc

IMX53IEC Datasheet(HTML) 38 Page - Freescale Semiconductor, Inc

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