MCIMX257DJM4(2009) 查看數據表（PDF） - Freescale Semiconductor

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MCIMX257DJM4
(Rev.:2009)

i.MX25 Applications Processor for Consumer and Industrial Products

Freescale Semiconductor 

3.4.1.2 DDR_TYPE = 01 SDRAM I/O DC Parameters

Table 14 shows the DC I/O parameters for SDRAM.

Table 14. SDRAM DC Electrical Characteristics

DC Electrical Characteristics Symbol Test Conditions

High-level output voltage

Voh Ioh = Specified Drive

(Ioh = –4, –8, –12,

–16mA)

Low-level output voltage

Vol

Ioh = Specified Drive

(Ioh = 4, 8, 12, 16mA)

High-level output current

I

Standard Drive

High Drive

Ioh

Max. Drive

Low-level output current

I

Standard Drive

High Drive

Iol

Max. Drive

High-level DC input voltage

VIH

—

Low-level DC input voltage

VIL

—

Input current (no pull-up/down)

IIN

VI = 0

VI = OVDD

High-impedance I/O supply current Icc-ovdd VI = OVDD or 0

High-impedance core supply

current

Icc-vddi

VI = VDD or 0

Min.

2.4

—

–4.0

–8.0

–12.0

4.0

8.0

12.0

2.0

–0.3 V

—

—

—

Typ.

—

—

—

—

—

—

—

—

—

Max.

—

Units Notes

V

1

0.4

V

1

—

mA —

—

mA —

3.6

0.8

150

80

1180

1220

V

—

V

nA 2, 3

nA 2, 3

nA

Note:

1. Simulation circuit for parameters Voh and Vol for I/O cells is below

2. Minimum condition: bcs model, OVDD = 3.6 V, and –40 °C. Typical condition: typical model, OVDD = 3.3 V, and 25 °C.

Maximum condition: wcs model, OVDD = 3.0 V, and 105 °C.

3. Typical condition: typical model, OVDD = 3.3 V, and 25 °C. Maximum condition: bcs model, OVDD = 3.6 V, and 105 °C.

3.4.1.3 DDR_TYPE = 10 Max Setting DDR I/O DC Parameters

Table 15 shows the I/O parameters for DDR2 (SSTL_18).

Table 15. DDR2 (SSTL_18) I/O DC Electrical Characteristics

DC Electrical Characteristics

High-level output voltage

Low-level output voltage

Output min. source current

Output min. sink current

DC input logic high

DC input logic low

Symbol

Voh

Vol

IIoh

IIol

VIH(dc)

VIL(dc)

Test

Conditions

Min.

—

OVDD – 0.28

—

—

—

–13.4

—

13.4

—

OVDD/2 + 0.125

—

–0.3 V

Typ.

—

—

—

—

—

—

Max.

Units Notes

—

V

—

0.28

V

—

mA

1

—

mA

2

OVDD + 0.3

V

—

OVDD/2 – 0.125 V

—

i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 2

Freescale Semiconductor

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