参数资料
型号: MSC8144E
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 数字信号处理
英文描述: 0-BIT, 150 MHz, OTHER DSP, PBGA783
封装: 29 X 29 MM, LEAD FREE, PLASTIC, FCPBGA-783
文件页数: 65/80页
文件大小: 2284K
代理商: MSC8144E
MSC8144E Quad Core Digital Signal Processor Data Sheet, Rev. 0
Hardware Design Considerations
Freescale Semiconductor
68
3.3.1.2
16-Bit DDR Memory Only
Table 58 lists unused pin connection when using 16-bit DDR memory. The 16 most significant data lines are not used.
3.3.1.3
ECC Unused Pin Connections
When the error code corrected mechanism is not used in any 32- or 16-bit DDR configuration, refer to Table 59 to determine
the correct pin connections.
Table 58. Connectivity of DDR Related Pins When Using 16-bit DDR Memory Only
Signal Name
Pin connection
MDQ[0–15]
in use
MDQ[16–31]
pull-up to VDDDDR
MDQS[0–1]
in use
MDQS[2–3]
pull-down to GND
MDQS[0–1]
in use
MDQS[2–3]
pull-up to VDDDDR
MA[0–15]
in use
MCK[0–2]
in use
MCK[0–2]
in use
MCS[0–1]
in use
MDM[0–1]
in use
MDM[2–3]
NC
MBA[0–2]
in use
MCAS
in use
MCKE[0–1]
in use
MODT[0–1]
in use
MDIC[0–1]
in use
MRAS
in use
MWE
in use
MVREF
1/2*VDDDDR
VDDDDR
2.5 V or 1.8 V
Table 59. Connectivity of Unused ECC Mechanism Pins
Signal Name
Pin connection
MECC[0–7]
pull-up to VDDDDR
ECC_MDM
NC
ECC_MDQS
pull-down to GND
ECC_MDQS
pull-up to VDDDDR
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