IMX51A datasheet(21/160 Pages) FREESCALE

21 / 160 page

Electrical Characteristics

i.MX51A Automotive and Infotainment Applications Processors, Rev. 1

Freescale Semiconductor

Preliminary—Subject to Change Without Notice

3.3.2

DDR2 I/O DC Parameters

The parameters in Table 14 are guaranteed per the operating ranges in Table 8, unless otherwise noted.

Input Hysteresis

VHYS

OVDD = 1.875

OVDD = 2.775

0.25

0.34

0.45

—V

Schmitt trigger VT+1, 2

VT+

—

0.5OVDD

—

Schmitt trigger VT-1, 2

VT-

—

0.5

× OVDD

Input current (no pull-up/down)

IIN

VI = OVDD or 0

—

TBD

—

Input current (22 k

Ω Pull-up)

IIN

VI = 0

VI = OVDD

—

161

TBD

μA

Input current (47 k

Ω Pull-up)

IIN

VI = 0

VI = OVDD

——

TBD

μA

Input current (100 k

Ω Pull-up)

IIN

VI = 0

VI= OVDD

——

TBD

μA

Input current (100 k

Ω Pull-down)

IIN

VI = 0

VI = OVDD

——

TBD

μA

High-impedance I/O supply

current

Icc-ovdd

VI = OVDD or 0

—

TBD

μA

Keeper Circuit Resistance

OVDD = 1.875V

OVDD = 2.775V

—

1 To maintain a valid level, the transition edge of the input must sustain a constant slew rate (monotonic) from the current DC

level through to the target DC level, VIL or VIH. Monotonic input transition time is from 0.1ns to 1s.

2 Hysteresis of 250 mV is guaranteed over all operating conditions when hysteresis is enabled.

Table 14. DDR2 I/O DC Electrical Parameters

Parameters

Symbol

Test Conditions

Min

Max

Unit

High-level output voltage

Voh

—

OVDD – 0.28

—

Low-level output voltage

Vol

—

0.28

Output minimum Source Current

Ioh

OVDD=1.7V Vout=1.42V –13.4

—

Output min Sink Current

Iol

OVDD=1.7V Vout=0.28V 13.4

—

DC input Logic High

VIH

—

OVDD/2+0.125 OVDD+0.3

DC input Logic Low

VIL

—

–0.3

OVDD/2–0.125 V

Input voltage range of each differential input

Vin

—

–0.3

OVDD+0.3

Differential input voltage required for switching

Vid

—

0.25

OVDD+0.6

Termination Voltage

Vtt

Vtt tracking OVDD/2

OVDD/2 – 0.04 OVDD/2 + 0.04 V

Input current (no pull-up/down)

Iin

VI = 0

VI=OVDD

—

TBD

µA

Table 13. GPIO/HSGPIO DC Electrical Characteristics (continued)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

IMX51A Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc

IMX51A Datasheet(HTML) 21 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