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參數(shù)資料
| 型號： | MSC8152TVT1000B |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | RISC PROCESSOR, PBGA783 |
| 封裝： | 29 X 29 MM, LEAD FREE, PLASTIC, FCBGA-783 |
| 文件頁數(shù)： | 49/68頁 |
| 文件大?。?/td> | 907K |
| 代理商： | MSC8152TVT1000B |
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Hardware Design Considerations
MSC8152 Dual-Core Digital Signal Processor Data Sheet, Rev. 1
Freescale Semiconductor
53
3
Hardware Design Considerations
The following sections discuss areas to consider when the MSC8152 device is designed into a system.
3.1
Power Supply Ramp-Up Sequence
The following subsections describe the required device initialization sequence.
3.1.1
Clock, Reset, and Supply Coordination
Starting the device requires coordination between several inputs including: clock, reset, and power supplies. Follow this
guidelines when starting up an MSC8152 device:
PORESET and TRST must be asserted externally for the duration of the supply ramp-up, using the VDDIO supply.
TRST deassertion does not have to be synchronized with PORESET deassertion. However, TRST must be deasserted
before normal operation begins to ensure correct functionality of the device.
CLKIN should toggle at least 32 cycles before PORESET deassertion to guarantee correct device operation. The 32
cycles should only be counted from the time after VDDIO reaches its nominal value (see timing 1 in Figure 33).
CLKIN should either be stable low during ramp-up of VDDIO supply (and start its swings after ramp-up) or should
swing within VDDIO range during VDDIO ramp-up, so its amplitude grows as VDDIO grows during ramp-up.
Figure 33 shows a sequence in which VDDIO ramps-up after VDD and CLKIN begins to toggle with the raise of VDDIO supply.
Note:
For details on power-on reset flow and duration, see the Reset chapter in the MSC8152 Reference Manual.
Figure 33. Supply Ramp-Up Sequence with VDD Ramping Before VDDIO and CLKIN Starting With VDDIO
Vo
lt
a
g
e
Time
VDDIO Nominal
PORESET/TRST asserted
VDD Nominal
CLKIN starts toggling
VDD applied
PORESET deasserted
1
VDDIO applied
VDDIO = Nominal
VDD = Nominal
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSC8154 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Quad-Core Digital Signal Processor |
| MSC8154_11 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Quad-Core Digital Signal processor |
| MSC8154E | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Quad-Core Digital Signal Processor with Security |
| MSC8154E_11 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Quad-Core Digital Signal Processor with Security |
| MSC8154ESVT1000B | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC DSP StarCore 6-cores 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(shè)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(fēng)格:SMD/SMT |
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