mpc8641 Freescale Semiconductor, Inc, mpc8641 Datasheet - Page 22

• Manufacturer Part Number: mpc8641
• Description: Integrated Host Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

DDR and DDR2 SDRAM
Table 15
Dn_GV
Table 16
Table 17
22
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. D n _GV
2. MV
3. V
4. Output leakage is measured with all outputs disabled, 0 V
Input/output capacitance: DQ, DQS
Delta input/output capacitance: DQ, DQS
Note:
1. This parameter is sampled. D n _GV
Peak-to-peak noise on D n _MV
equal to D n _MV
TT
V
REF
DD
is not applied directly to the device. It is the supply to which far end signal termination is made and is expected to be
OUT
Current draw for MV
1. The voltage regulator for MV
provides the recommended operating conditions for the DDR SDRAM component(s) when
provides the DDR capacitance when Dn_
provides the current draw characteristics for MV
DD
is expected to be equal to 0.5 × D n _GV
(typ) = 2.5 V
Parameter/Condition
(peak-to-peak) = 0.2 V.
is expected to be within 50 mV of the DRAM D n _GV
Table 15. DDR SDRAM DC Electrical Characteristics for D n _GV
Parameter / Condition
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
Parameter/Condition
REF
OUT
OUT
. This rail should track variations in the DC level of D n _MV
Table 16. DDR SDRAM Capacitance for D n _GV
= 0.35 V)
.
= 1.95 V)
REF
Table 17. Current Draw Characteristics for MV
REF
may not exceed ±2% of the DC value.
REF
DD
must be able to supply up to 500 μA current.
= 2.5 V ± 0.125 V, f = 1 MHz, T
D n _MV
D n _GV
Symbol
DD
V
V
I
V
I
I
OH
OZ
OL
Symbol
TT
IH
IL
I
, and to track D n _GV
MVREF
REF
DD
Symbol
GV
C
C
D n _MV
D n _MV
≤
0.49 × D n _GV
DIO
IO
DD
V
OUT
DD
(typ)=2.5 V.
2.375
–16.2
–0.3
16.2
REF
Min
–50
REF
REF
Min
at all times.
≤
—
D n _GV
.
– 0.04
+ 0.15
DD
Min
—
A
DD
6
DC variations as measured at the receiver.
= 25°C, V
DD
DD
Max
500
REF
.
D n _MV
D n _MV
0.51 × D n _GV
D n _GV
(typ) = 2.5 V
.
REF
OUT
2.625
Max
Max
REF
50
REF
—
—
0.5
DD
DD
8
= D n _GVDD/2,
Unit
– 0.15
+ 0.04
(typ) = 2.5 V
+ 0.3
μA
DD
Freescale Semiconductor
Unit
pF
pF
Unit
mA
mA
μA
V
V
V
V
V
Note
1
Notes
Notes
1
1
—
—
—
—
1
2
3
4