ppc8572elpxavnd Freescale Semiconductor, Inc, ppc8572elpxavnd Datasheet - Page 20

• Manufacturer Part Number: ppc8572elpxavnd
• Description: Mpc8572e Powerquicc Iii Integrated Communications Processors
• Manufacturer: Freescale Semiconductor, Inc

DDR2 and DDR3 SDRAM Controller
Table 12
Table 13
6.2
This section provides the AC electrical characteristics for the DDR SDRAM Controller interface. The
DDR controller supports both DDR2 and DDR3 memories. Note that although the minimum data rate for
most off-the-shelf DDR3 DIMMs available is 800 MHz, JEDEC specification does allow the DDR3 to run
at the data rate as low as 606 MHz. Unless otherwise specified, the AC timing specifications described in
this section for DDR3 is applicable for data rate between 606 MHz and 800 MHz, as long as the DC and
20
Current draw for MV
1. The voltage regulator for MV
Output leakage current
Notes:
1. GV
2. MV
3. Output leakage is measured with all outputs disabled, 0 V
Peak-to-peak noise on MV
Input/output capacitance: DQ, DQS, DQS
Delta input/output capacitance: DQ, DQS, DQS
Note:
1. This parameter is sampled. GV
2. This parameter is sampled. GV
Table 11. DDR3 SDRAM Interface DC Electrical Characteristics for GV
(peak-to-peak) = 0.2 V.
(peak-to-peak) = 0.175 V.
DD
REF
provides the DDR SDRAM Controller interface capacitance for DDR2 and DDR3.
provides the current draw characteristics for MV
is expected to be within 50 mV of the DRAM GV
DDR2 and DDR3 SDRAM Interface AC Electrical Characteristics
Table 12. DDR2 and DDR3 SDRAM Interface Capacitance for GV
n is expected to be equal to 0.5 × GV
Parameter/Condition
Parameter / Condition
Parameter/Condition
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
REF
n
REF
REF
Table 13. Current Draw Characteristics for MV
n may not exceed ±1% of the DC value.
n must be able to supply up to 1500 μA or 1250 uA current for DDR2 or DDR3 respectively.
DDR2 SDRAM
DDR3 SDRAM
DD
DD
= 1.5 V ± 0.075 V (for DDR3), f = 1 MHz, T
= 1.8 V ± 0.090 V (for DDR2), f = 1 MHz, T
DD
Symbol
, and to track GV
I
OZ
DD
Symbol
C
C
Symbol
I
at all times.
≤
DIO
MVREF
IO
V
OUT
DD
Min
–50
n
REF
≤
DC variations as measured at the receiver.
GV
n.
DD
Min
—
6
.
Min
—
A
A
= 25°C, V
= 25°C, V
DD
REF
Typical
DD
Typical
50
(typ)=1.8 V and 1.5 V
0.5
(typ) = 1.5 V (continued)
n
8
1500
1250
Max
OUT
OUT
= GV
= GV
Freescale Semiconductor
Max
pF
pF
DD
DD
Unit
Max
μA
μA
/2, V
/2, V
OUT
OUT
Unit
1, 2
1, 2
Unit
Note
3
1