参数资料
型号: MPC8378CVRALG
厂商: Freescale Semiconductor
文件页数: 40/128页
文件大小: 0K
描述: MPU POWERQUICC II PRO 689-PBGA
标准包装: 27
系列: MPC83xx
处理器类型: 32-位 MPC83xx PowerQUICC II Pro
速度: 667MHz
电压: 1V
安装类型: 表面贴装
封装/外壳: 689-BBGA 裸露焊盘
供应商设备封装: 689-TEPBGA II(31x31)
包装: 托盘
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
Freescale Semiconductor
19
This table provides the input AC timing specifications for the DDR1 and DDR2 SDRAM interface.
6.2.2
DDR1 and DDR2 SDRAM Output AC Timing Specifications
This table shows the DDR1 and DDR2 SDRAM output AC timing specifications.
Table 20. DDR1 and DDR2 SDRAM Input AC Timing Specifications
Parameter
Symbol
Min
Max
Unit
Note
Controller skew for MDQS-MDQ/MECC/MDM
400 MHz data rate
333 MHz data rate
266 MHz data rate
tCISKEW
–500
–750
500
750
ps
Note:
1. tCISKEW represents the total amount of skew consumed by the controller between MDQSn 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 – |tCISKEW|] where T is the MCK clock period and |tCISKEW| is the
absolute value of tCISKEW.
3. This specification applies only to DDR2 interface.
Table 21. DDR1 and DDR2 SDRAM Output AC Timing Specifications
Parameter
Symbol1
Min
Max
Unit
Note
MCK
n cycle time, MCKn/MCKn crossing
tMCK
510
ns
ADDR/CMD output setup with respect to MCK
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
tDDKHAS
1.95
2.40
3.15
4.20
ns
ADDR/CMD output hold with respect to MCK
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
tDDKHAX
1.95
2.40
3.15
4.20
ns
MCS
n output setup with respect to MCK
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
tDDKHCS
1.95
2.40
3.15
4.20
ns
MCS
n output hold with respect to MCK
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
tDDKHCX
1.95
2.40
3.15
4.20
ns
MCK to MDQS skew
tDDKHMH
–0.6
0.6
ns
相关PDF资料
PDF描述
355-020-520-204 CARDEDGE 20POS DL .156 LOPRO BLK
MPC8378CVRAJF MPU POWERQUICC II PRO 689-PBGA
MPC8378CVRAGD MPU POWERQUICC II PRO 689-PBGA
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345-012-527-202 CARDEDGE 12POS DUAL .100 GREEN
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