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參數(shù)資料
| 型號： | MSC7116 |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 英文描述： | Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC |
| 中文描述： | 低成本16位數(shù)字信號處理器與DDR控制器和10/100 Mbps以太網(wǎng)MAC |
| 文件頁數(shù)： | 45/56頁 |
| 文件大?。?/td> | 719K |
| 代理商： | MSC7116 |
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Hardware Design Considerations
MSC7116 10/100 Mbps Ethernet MAC Data Sheet, Rev. 11
Freescale Semiconductor
45
3.3.2
Peripheral Power
Peripherals include the DDR memory controller, Ethernet controller, DMA controller, HDI16, TDM, UART, timers, GPIOs,
and the I
2
C module. Basic power consumption by each module is assumed to be the same and is computed by using the
following equation which assumes an effective load of 20 pF, core voltage swing of 1.2 V, and a switching frequency of 133
MHz. This yields:
P
PERIPHERAL
= 20 pF
×
(1.2 V)
2
×
133 MHz
×
10
–3
= 3.83 mW per peripheral
Eqn. 6
Multiply this value by the number of peripherals used in the application to compute the total peripheral power consumption.
3.3.3
External Memory Power
Estimation of power consumption by the DDR memory system is complex. It varies based on overall system signal line usage,
termination and load levels, and switching rates. Because the DDR memory includes terminations external to the MSC7116
device, the 2.5 V power source provides the power for the termination, which is a static value of 16 mA per signal driven high.
The dynamic power is computed, however, using a differential voltage swing of ±0.200 V, yielding a peak-to-peak swing of 0.4
V. The equations for computing the DDR power are:
P
DDRIO
= P
STATIC
+ P
DYNAMIC
Eqn. 7
P
STATIC
= (unused pins
×
% driven high)
×
16 mA
×
2.5 V
Eqn. 8
P
DYNAMIC
= (pin activity value)
×
20 pF
×
(0.4 V)
2
×
266 MHz
×
10
–3
mW
Eqn. 9
pin activity value = (active data lines
×
% activity
×
% data switching) + (active address lines
×
% activity)
Eqn. 10
As an example, assume the following:
unused pins = 16 (DDR uses 16-pin mode)
% driven high = 50%
active data lines = 16
% activity = 60%
% data switching = 50%
active address lines = 3
In this example, the DDR memory power consumption is:
P
DDRIO
= ((16
×
0.5)
×
16
×
2.5) + (((16
×
0.6
×
0.5) + (3
×
0.6))
×
20
×
(0.4)
2
×
266
×
10
–3
) = 326.3 mW
Eqn. 11
3.3.4
External I/O Power
The estimation of the I/O power is similar to the computation of the peripheral power estimates. The power consumption per
signal line is computed assuming a maximum load of 20 pF, a voltage swing of 3.3 V, and a switching frequency of 33 MHz,
which yields:
P
IO
= 20 pF
×
(3.3 V)
2
×
33 MHz
×
10
–3
= 7.19 mW per I/O line
Eqn. 12
Multiply this number by the number of I/O signal lines used in the application design to compute the total I/O power.
Note:
The signal loading depends on the board routing. For systems using a single DDR device, the load could be as low as
7 pF.
3.3.5
Leakage Power
The leakage power is for all power supplies combined at a specific temperature. The value is temperature dependent. The
observed leakage value at room temperature is 64 mW.
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相關代理商/技術參數(shù) |
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| MSC7116_08 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC |
| MSC7116VF1000 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 7116 STARLITE PB-BEARING RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MSC7116VM1000 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 7116 STARLITE - PBF RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| MSC7116VM800 | 功能描述:IC DSP PROCESSOR 16BIT 400MAPBGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:StarCore 標準包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應商設備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| MSC7118 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Low-Cost 16-bit DSP with DDR Controller |
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