MPC8377E datasheet(17/127 Pages) FREESCALE

17 / 127 page

MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8

Freescale Semiconductor

6.1

DDR1 and DDR2 SDRAM DC Electrical Characteristics

This table provides the recommended operating conditions for the DDR2 SDRAM component(s) of the

device when GVDD(typ) = 1.8 V.

Table 14 provides the DDR2 capacitance when GVDD(typ) = 1.8 V.

This table provides the recommended operating conditions for the DDR SDRAM component(s) when

GVDD(typ) = 2.5 V.

Table 13. DDR2 SDRAM DC Electrical Characteristics for GVDD(typ) = 1.8 V

Parameter

Symbol

Min

Max

Unit

Note

I/O supply voltage

GVDD

1.71

1.89

I/O reference voltage

MVREF

0.49

× GVDD

0.51

× GVDD

V2, 5

I/O termination voltage

VTT

MVREF –0.04

MVREF +0.04

Input high voltage

VIH

MVREF + 0.140

GVDD +0.3

—

Input low voltage

VIL

–0.3

MVREF – 0.140

—

Output leakage current

IOZ

–50

μA4

Output high current (VOUT =1.40V)

IOH

–13.4

—

Output low current (VOUT =0.3 V)

IOL

13.4

—

Notes:

1. GVDD is expected to be within 50 mV of the DRAM GVDD at all times.

2. MVREF is expected to be equal to 0.5 × GVDD, and to track GVDD DC variations as measured at the receiver. Peak-to-peak

noise on MVREF may not exceed ±2% of the DC value.

3. VTT is not applied directly to the device. It is the supply to which far end signal termination is made and is expected to be

equal to MVREF. This rail should track variations in the DC level of MVREF.

4. Output leakage is measured with all outputs disabled, 0 V

≤ V

OUT ≤ GVDD.

5. See AN3665, “MPC837xE Design Checklist,” for proper DDR termination.

Table 14. DDR2 SDRAM Capacitance for GVDD(typ) = 1.8 V

Parameter

Symbol

Min

Max

Unit

Note

Input/output capacitance: DQ, DQS, DQS

CIO

Delta input/output capacitance: DQ, DQS, DQS

CDIO

—0.5

Note:

1. This parameter is sampled. GVDD = 1.8 V ± 0.090 V, f = 1 MHz, TA = 25°C, VOUT = GVDD/2, VOUT (peak-to-peak) = 0.2 V.

Table 15. DDR SDRAM DC Electrical Characteristics for GVDD (typ) = 2.5 V

Parameter

Symbol

Min

Max

Unit

Note

I/O supply voltage

GVDD

2.375

2.625

I/O reference voltage

MVREF

0.49

× GVDD

0.51

× GVDD

V2, 5

I/O termination voltage

VTT

MVREF – 0.04

MVREF + 0.04

Input high voltage

VIH

MVREF + 0.18

GVDD + 0.3

—

MPC8377E bảng dữ liệu(PDF) 17 Page - Freescale Semiconductor, Inc

MPC8377E bảng dữ liệu(HTML) 17 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

bảng dữ liệu tải về

Link URL