MPC8548E Freescale, MPC8548E Datasheet - Page 19

• Manufacturer Part Number: MPC8548E
• Description: Integrated Processor
• Manufacturer: Freescale

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6
This section describes the DC and AC electrical specifications for the DDR SDRAM interface of the
MPC8548E. Note that GV
SDRAM.
6.1
Table 10
MPC8548E when GV
Table 11
Freescale Semiconductor
I/O supply voltage
I/O reference voltage
I/O termination voltage
Input high voltage
Input low voltage
Output leakage current
Output high current (V
Output low current (V
Notes:
1. GV
2. MV
3. V
4. Output leakage is measured with all outputs disabled, 0 V
Input/output capacitance: DQ, DQS, DQS
Delta input/output capacitance: DQ, DQS, DQS
Note:
1. This parameter is sampled. GV
noise on MV
equal to MV
TT
DD
REF
is not applied directly to the device. It is the supply to which far end signal termination is made and is expected to be
DDR and DDR2 SDRAM
is expected to be within 50 mV of the DRAM V
is expected to be equal to 0.5 × GV
provides the DDR2 I/O capacitance when GV
provides the recommended operating conditions for the DDR2 SDRAM controller of the
Parameter/Condition
DDR SDRAM DC Electrical Characteristics
REF
REF
Parameter/Condition
MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 4
Table 10. DDR2 SDRAM DC Electrical Characteristics for GV
. This rail should track variations in the DC level of MV
may not exceed ±2% of the DC value.
OUT
OUT
= 0.280 V)
DD
= 1.420 V)
Table 11. DDR2 SDRAM Capacitance for GV
(typ) = 1.8 V
DD
DD
(typ) = 2.5 V for DDR SDRAM, and GV
= 1.8 V ± 0.090 V, f = 1 MHz, T
.
DD
, and to track GV
Symbol
MV
GV
V
V
I
I
V
I
OH
OZ
OL
TT
REF
IH
IL
DD
DD
at all times.
Symbol
≤
C
V
C
DIO
MV
OUT
IO
MV
DD
0.49 × GV
DD
REF
A
DC variations as measured at the receiver. Peak-to-peak
REF
≤
–13.4
(typ) = 1.8 V.
1.71
–0.3
13.4
= 25°C, V
Min
–50
GV
+ 0.125
– 0.04
REF
DD
DD
.
.
Min
—
OUT
6
DD
(typ)=1.8 V
= GV
DD
MV
MV
0.51 × GV
GV
(typ) = 1.8 V for DDR2
DD
REF
DD
REF
DD
Max
1.89
/2, V
50
—
—
(typ) = 1.8 V
– 0.125
+ 0.04
Max
+ 0.3
0.5
8
OUT
DD
(peak-to-peak) = 0.2 V.
DDR and DDR2 SDRAM
Unit
Unit
mA
mA
μA
pF
pF
V
V
V
V
V
Notes
Notes
—
—
—
—
1
2
4
3
1
1
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