Figure 5 provides the AC test load for the DDR bus.
DUART
Output
Z0 = 50 Ω
RL = 50 Ω
GVDD/2
Figure 5. DDR AC Test Load
Table 15. DDR SDRAM Measurement Conditions
Symbol
VTH
VOUT
Notes:
1. Data input threshold measurement point.
2. Data output measurement point.
DDR
MVREF ± 0.31 V
0.5 × GVDD
Unit
Notes
V
1
V
2
7 DUART
This section describes the DC and AC electrical specifications for the DUART interface of the
MPC8541E.
7.1 DUART DC Electrical Characteristics
Table 16 provides the DC electrical characteristics for the DUART interface of the MPC8541E.
Table 16. DUART DC Electrical Characteristics
Parameter
Symbol
Test Condition
Min
Max
High-level input voltage
VIH
VOUT ≥ VOH (min) or
2
OVDD + 0.3
Low-level input voltage
Input current
VIL
VOUT ≤ VOL (max)
–0.3
0.8
IIN
VIN 1 = 0 V or VIN = VDD
—
±5
High-level output voltage
VOH
OVDD = min,
OVDD – 0.2
—
IOH = –100 μA
Low-level output voltage
VOL
OVDD = min, IOL = 100 μA
—
0.2
Note:
1. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.
Unit
V
V
μA
V
V
MPC8541E PowerQUICC™ III Integrated Communications Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
19