MPC8306S PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
14 Freescale Semiconductor
DDR2 SDRAM
The following table provides the DDR2 capacitance when GV
DD
(typ) = 1.8 V.
6.2 DDR2 SDRAM AC Electrical Characteristics
This section provides the AC electrical characteristics for the DDR2 SDRAM interface.
6.2.1 DDR2 SDRAM Input AC Timing Specifications
This table provides the input AC timing specifications for the DDR2 SDRAM (GV
DD
(typ) = 1.8 V).
The following table provides the input AC timing specifications for the DDR2 SDRAM interface.
Output high current (V
OUT
= 1.35 V) I
OH
–13.4 — mA —
Output low current (V
OUT
= 0.280 V) I
OL
13.4 — mA —
Notes:
1. GV
DD
is expected to be within 50 mV of the DRAM GV
DD
at all times.
2. MVREF is expected to be equal to 0.5 GV
DD
, and to track GV
DD
DC variations as measured at the receiver. Peak-to-peak
noise on MVREF may not exceed ±2% of the DC value.
3. V
TT
is not applied directly to the device. It is the supply to which far end signal termination is made and is expected to be
equal to MVREF. This rail should track variations in the DC level of MVREF.
4. Output leakage is measured with all outputs disabled, 0 V
V
OUT
GV
DD
.
Table 13. DDR2 SDRAM Capacitance for GV
DD
(typ) = 1.8 V
Parameter/Condition Symbol Min Max Unit Note
Input/output capacitance: DQ, DQS C
IO
68pF1
Delta input/output capacitance: DQ, DQS C
DIO
—0.5pF1
Note:
1. This parameter is sampled. GV
DD
= 1.8 V ± 0.100 V, f = 1 MHz, T
A
=25°C, V
OUT
= GV
DD
2,
V
OUT
(peak-to-peak) = 0.2 V.
Table 14. DDR2 SDRAM Input AC Timing Specifications for 1.8-V Interface
At recommended operating conditions with GV
DD
of 1.8 V± 100mV.
Parameter Symbol Min Max Unit Note
AC input low voltage V
IL
— MVREF
– 0.25 V —
AC input high voltage V
IH
MVREF
+ 0.25 — V —
Table 15. DDR2 SDRAM Input AC Timing Specifications
At recommended operating conditions with GV
DD
of 1.8V ± 100mV.
Parameter Symbol Min Max Unit Note
Controller skew for MDQS—MDQ/MDM t
CISKEW
ps 1, 2
Table 12. DDR2 SDRAM DC Electrical Characteristics for GV
DD
(typ) = 1.8 V (continued)
Parameter/Condition Symbol Min Max Unit Note
