參數(shù)資料
型號(hào)： MPC8323E-MDS-PB
廠商： Freescale Semiconductor
文件頁數(shù)： 7/82頁
文件大小： 0K
描述： BOARD MODULE DEV SYSTEM 8323
標(biāo)準(zhǔn)包裝： 1
類型： MPU
適用于相關(guān)產(chǎn)品： MPC8323
所含物品： 板
MPC8323E PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 4
Freescale Semiconductor
15
DDR1 and DDR2 SDRAM
6.2
DDR1 and DDR2 SDRAM AC Electrical Characteristics
This section provides the AC electrical characteristics for the DDR1 and DDR2 SDRAM interface.
6.2.1
DDR1 and DDR2 SDRAM Input AC Timing Specifications
Table 16 provides the input AC timing specifications for the DDR2 SDRAM (Dn_GVDD(typ) = 1.8 V).
Table 17 provides the input AC timing specifications for the DDR1 SDRAM (Dn_GVDD(typ) = 2.5 V).
Table 18 provides the input AC timing specifications for the DDR1 and DDR2 SDRAM interface.
Table 16. DDR2 SDRAM Input AC Timing Specifications for 1.8-V Interface
At recommended operating conditions with D
n_GVDD of 1.8 ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
AC input low voltage
VIL
—
MVREF
nREF – 0.25
V
—
AC input high voltage
VIH
MVREF
nREF + 0.25
—
V
—
Table 17. DDR1 SDRAM Input AC Timing Specifications for 2.5 V Interface
At recommended operating conditions with D
n_GVDD of 2.5 ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
AC input low voltage
VIL
—
MVREF
nREF – 0.31
V
—
AC input high voltage
VIH
MVREF
nREF + 0.31
—
V
—
Table 18. DDR1 and DDR2 SDRAM Input AC Timing Specifications
At recommended operating conditions with D
n_GVDD of (1.8 or 2.5 V) ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
Controller skew for MDQS—MDQ/MDM
tCISKEW
ps
1, 2
266 MHz
200 MHz
–750
–1250
750
1250
Notes:
1. tCISKEW represents the total amount of skew consumed by the controller between MDQS[n] and any corresponding bit that
is 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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MPC8323EVRADDCA 制造商:Freescale Semiconductor 功能描述:POWERQUICC, 32 BIT POWER ARCHITECTURE SOC, 266MHZ E300, QE, - Trays 制造商:Freescale Semiconductor 功能描述:IC MPU PWRQUICC 266MHZ 516BGA
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