参数资料
型号: MPC8572CPXAUNB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1333 MHz, MICROPROCESSOR, PBGA1023
封装: 33 X 33 MM, PLASTIC, FCBGA-1023
文件页数: 54/138页
文件大小: 1502K
代理商: MPC8572CPXAUNB
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
22
Freescale Semiconductor
DDR2 and DDR3 SDRAM Controller
as well as the specifications and requirements described in this MPC8572E hardware specifications
document.
6.2.1
DDR2 and DDR3 SDRAM Interface Input AC Timing Specifications
Table 14, Table 15, and Table 16 provide the input AC timing specifications for the DDR controller when
interfacing to DDR2 and DDR3 SDRAM.
Table 14. DDR2 SDRAM Interface Input AC Timing Specifications for 1.8-V Interface
At recommended operating conditions with GVDD of 1.8 V ± 5%
Parameter
Symbol
Min
Max
Unit
Notes
AC input low voltage
>=667 MHz
VILAC
—MVREFn – 0.20
V
<= 533MHz
MVREFn – 0.25
AC input high voltage
>=667 MHz
VIHAC
MVREFn + 0.20
V
<= 533MHz
MVREFn + 0.25
Table 15. DDR3 SDRAM Interface Input AC Timing Specifications for 1.5-V Interface
At recommended operating conditions with GVDD of 1.5 V ± 5%. DDR3 data rate is between 606MHz and 800MHz.
Parameter
Symbol
Min
Max
Unit
Notes
AC input low voltage
VILAC
—MVREFn – 0.175
V
AC input high voltage
VIHAC
MVREFn + 0.175
V
Table 16. DDR2 and DDR3 SDRAM Interface Input AC Timing Specifications
At recommended operating conditions with GVDD of 1.8 V ± 5% for DDR2 or 1.5 V ± 5% for DDR3.
Parameter
Symbol
Min
Max
Unit
Notes
Controller Skew for MDQS—MDQ/MECC
tCISKEW
ps
1, 2
800 MHz
–200
200
667 MHz
–240
240
533 MHz
–300
300
400 MHz
–365
365
Note:
1. tCISKEW represents the total amount of skew consumed by the controller between MDQS[n] and any corresponding
bit that will be captured with MDQS[n]. This should be subtracted from the total timing budget.
2. The amount of skew that can be tolerated from MDQS to a corresponding MDQ signal is called tDISKEW.This can
be determined by the following equation: tDISKEW =+/–(T/4 – abs(tCISKEW)) where T is the clock period and
abs(tCISKEW) is the absolute value of tCISKEW.
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