mpc8378e Freescale Semiconductor, Inc, mpc8378e Datasheet - Page 18

• Manufacturer Part Number: mpc8378e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

DDR1 and DDR2 SDRAM
Table 16
Table 17
6.2
This section provides the AC electrical characteristics for the DDR SDRAM interface.
6.2.1
Table 18
Table 19
18
AC input low voltage
AC input high voltage
Input/output capacitance: DQ, DQS
Delta input/output capacitance: DQ, DQS
Note:
1
Current draw for MV
Note:
1
2
AC input low voltage
AC input high voltage
This parameter is sampled. GV
The voltage regulator for MV
This current is divided equally between MVREF1 and MVREF2, where half the current flows through each pin.
provides the DDR capacitance when GV
provides the current draw characteristics for MV
provides the input AC timing specifications for the DDR2 SDRAM when
provides the input AC timing specifications for the DDR1 SDRAM when GV
DDR1 and DDR2 SDRAM AC Electrical Characteristics
DDR1 and DDR2 SDRAM Input AC Timing Specifications
Parameter
Parameter
Parameter
Table 18. DDR2 SDRAM Input AC Timing Specifications for 1.8-V Interface
Table 19. DDR1 SDRAM Input AC Timing Specifications for 2.5-V Interface
Parameter
REF
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
Table 16. DDR SDRAM Capacitance for GV
REF
Table 17. Current Draw Characteristics for MV
DD
must be able to supply up to the stated maximum current.
DDR1
DDR2
= 2.5 V ± 0.125 V, f = 1 MHz, T
Symbol
I
MVREF
Symbol
Symbol
V
V
V
V
IH
IH
IL
IL
Symbol
C
C
DIO
IO
DD
(typ) = 2.5 V.
Min
—
—
MV
MV
A
REF
= 25°C, V
REF
REF
Min
Min
—
.
—
Min
—
6
+ 0.25
+ 0.31
Typ
250
150
DD
OUT
(typ) = 2.5 V
= GV
REF
DD
Max
600
400
Max
0.5
8
/2, V
MV
MV
OUT
REF
REF
Max
Max
—
—
G
Freescale Semiconductor
– 0.25
(peak-to-peak) = 0.2 V.
– 0.31
VDD(typ)
Unit
μA
DD
Unit
pF
pF
(typ) = 2.5 V.
=
Note
Notes
1, 2
1.8 V.
Unit
Unit
V
V
V
V
1
1