- 您现在的位置：买卖IC网 > Datasheet目录344 > MSC8144ADS (Freescale Semiconductor)ADS FOR MSC8144 DEVICE Datasheet资料下载
参数资料
| 型号： | MSC8144ADS |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 67/80页 |
| 文件大小： | 0K |
| 描述： | ADS FOR MSC8144 DEVICE |
| 标准包装： | 1 |
| 类型： | DSP |
| 适用于相关产品： | MSC8144 |
| 所含物品： | AMC 卡、电源、缆线、USB TAP、硬件和说明文档 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页当前第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页
Hardware Design Considerations
3.3
Clock and Timing Signal Board Layout Considerations
When laying out the system board, use the following guidelines:
?
?
Note:
3.4
Note:
Keep clock and timing signal paths as short as possible and route with 50 Ω impedance.
Use a serial termination resistor placed close to the clock buffer to minimize signal reflection. Use the following
equation to compute the resistor value:
Rterm = Rim – Rbuf
where Rim = trace characteristic impedance
Rbuf = clock buffer internal impedance.
See MSC8144 CLKIN and PCI_CLK_IN Board Layout (AN3440) for an example layout.
Connectivity Guidelines
Although the package actually uses a ball grid array, the more conventional term pin is used to denote signal
connections in this discussion.
First, select the pin multiplexing mode to allocate the required I/O signals. Then use the guidelines presented in the following
subsections for board design and connections. The following conventions are used in describing the connectivity requirements:
1.
2.
3.
4.
5.
Note:
3.4.1
GND indicates using a 10 k Ω pull-down resistor (recommended) or a direct connection to the ground plane. Direct
connections to the ground plane may yield DC current up to 50mA through the I/O supply that adds to overall power
consumption.
V DD indicates using a 10 k Ω pull-up resistor (recommended) or a direct connection to the appropriate power supply.
Direct connections to the supply may yield DC current up to 50mA through the I/O supply that adds to overall power
consumption.
Mandatory use of a pull-up or pull-down resistor it is clearly indicated as “pull-up/pull-down”.
NC indicates “not connected” and means do not connect anything to the pin.
The phrase “in use” indicates a typical pin connection for the required function.
Please see recommendations #1 and #2 as mandatory pull-down or pull-up connection for unused pins in case of
subset interface connection.
DDR Memory Related Pins
This section discusses the various scenarios that can be used with DDR1 and DDR2 memory.
Note:
For information about unused differential/non-differential pins in DDR1/DDR2 modes (that is, unused negative lines
of strobes in DDR1), please refer to Table 51 .
3.4.1.1
DDR Interface Is Not Used
Table 51. Connectivity of DDR Related Pins When the DDR Interface Is Not Used
MDQ[0–31]
MDQS[0–3]
MDQS[0–3]
MA[0–15]
MCK[0–2]
MCK[0–2]
MCS[0–1]
Signal Name
Pin Connection
NC
NC
NC
NC
NC
NC
NC
MSC8144 Quad Core Digital Signal Processor Data Sheet, Rev. 16
Freescale Semiconductor
67
相关PDF资料 |
PDF描述 |
|---|---|
| MSC8156EVM | EVAL MODULE FOR MSC8156 LC |
| MSL1060AW | IC LED DRIVER 6 STRING |
| MSL1061AV | IC LED DRIVER 6 STRING |
| MSL2041GU | IC LED DRIVER 4 STRING |
| MSL2100BR | IC LED DRIVER 8 STRING |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MSC8144AMC-SA | 制造商:Freescale Semiconductor 功能描述:BOARD AMC SGL WIDTH MSC8144 DSP |
| MSC8144E | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Quad Core Digital Signal Processor |
| MSC8144EC | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Quad Core Digital Signal Processor |
| MSC8144ESVT1000B | 制造商:Freescale Semiconductor 功能描述:DSP 32-BIT 1GHZ 1000MIPS 783-PIN FCBGA BOX - Trays 制造商:Freescale Semiconductor 功能描述:ENCRYPTION PACSUN R2.1 783FCPBGA |
| MSC8144ESVT800A | 制造商:Freescale Semiconductor 功能描述:DSP 32BIT 800MHZ 800MIPS 783FCBGA - Trays |
发布紧急采购，3分钟左右您将得到回复。