Freescale Semiconductor Evaluation Kit (EVK) for the i.MX51 Applications Processor MCIMX51EXP MCIMX51EXP Ficha De Dados
Códigos do produto
MCIMX51EXP
i.MX51 Applications Processors for Consumer and Industrial Products, Rev. 6
40
Freescale Semiconductor
Electrical Characteristics
4.5.4
AC Electrical Characteristics for DDR2
The load circuit for output pads, the output pad transition time waveform and the output pad propagation
and transition time waveform are below.
and transition time waveform are below.
shows the output pad transition time waveform.
Figure 10. Output Pad Transition Time Waveform
shows the output pad propagation and transition time waveform.
Figure 11. Output Pad Propagation and Transition Time Waveform
AC electrical characteristics in DDR2 mode for fast mode and for ovdd = 1.65 – 1.95 V, ipp_hve = 0 are
placed in
placed in
Table 37. AC Electrical Characteristics of DDR2 IO Pads for Fast mode and
for ovdd=1.65–1.95 V (ipp_hve=0)
Parameter
Symbol
Test
Condition
Min
rise/fall
Typ
Max
rise/fall
Units
Output Pad Transition Times
1
tpr
15pF
35pF
35pF
0.57/0.57
1.29/1.29
1.29/1.29
0.45/0.44
0.97/0.94
0.97/0.94
0.45/0.45
0.82/0.85
0.82/0.85
ns
Output Pad Propagation Delay, 50%-50%
1
tpo
15pF
35pF
35pF
0.98/0.96
1.47/1.50
1.47/1.50
1.27/1.19
1.63/1.57
1.63/1.57
1.89/1.72
2.20/2.07
2.20/2.07
ns
Output Pad Slew Rate
1
tps
15pF
35pF
35pF
2.05/2.05
0.91/0.91
0.91/0.91
2.40/2.45
1.11/1.15
1.11/1.15
2.20/2.20
1.21/1.16
1.21/1.16
V/ns