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參數(shù)資料
| 型號(hào)： | LH0E776 |
| 英文描述： | ARM START-UP KIT WITH EMBEDDED Linux |
| 中文描述： | ARM的啟動(dòng)時(shí)用嵌入式Linux的套裝 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大小： | 244K |
| 代理商： | LH0E776 |
LH0E776 Summary Specification
Ver. 1.00
September 30, 2002
4
4. Explanation for individual blocks
Clock
The LH79532 uses an internal oscillator circuit known as PLL. It connects to a 32kHz crystal and
provides variable frequency from 10MHz to 50MHz. It can also generate the frequency from 1MHz
by dividing PLL clock in the PLL controller.
The ethernet controller IC (Cirrus Logic CS8900A) connects to a 20MHz crystal and runs at
20MHz.
Memory
Flash ROM : 4M bytes
2M words by 16 bit Flash ROM is mounted on the LH0E776 board. A 16 bit width bus connects the
Flash ROM to the LH79532. The chip select signal CE0 is assigned to the Flash ROM.
SDRAM : 32M bytes
Two of 8M words by 16bit SDRAM are mounted on the LH0E776 board. A 32 bit width bus
connects these two SDRAM chips to the LH79532. The chip select signal DCS0 is assigned to these
SDRAM.
The Flash ROM is assigned CE0, when LH0E776 board boots (RPC_MAP=0), CE0 will be assign
0x00000000 as the memory address. So, when LH0E776 board starts up, program counter begins at
the start of the Flash ROM address.
If the RPC_MAP of LH79532’s internal register is changed, the Memory Map of LH0E776 board
will be switched. In such a case, the SDRAM controller should have already been initialized and
configured before switching.
Ethernet
The ethernet controller IC of the Cirrus Logic CS8900A enables network communication through
the 10Base-T.
The chip select signal CE1 is for I/O mode use and CE2 is for Memory mode use on the CS8900A.
Please see the CS8900A data sheet for further details.
There are two Ethernet status LEDs. The red one indicates Link status and the green one indicates
Activity status.
LEDs/Dip switches
LH0E776 board has 7 bit LEDs and Dip switches connecting to PIO[25]-[31](PIOB[0]-[6]).
PB0-PB6 are displayed on the LH0E776 board.
Writing to PIOB of the LH79532 registers will turn to on or off these LEDs.* It is also possible to
turning on or off these LEDs by switching corresponding Dip switches.
Reading PIOB of LH79532 registers make possible judging on or off statuses of Dip switches.
You can also use these 7 bit PIOB as SPI or INTR. Please refer to PIOB Multiple functions of
LH79532 data sheet.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LH1 | 制造商:Thomas & Betts 功能描述: |
| LH10 | 制造商:CML Innovative Technologies 功能描述:LAMP HOLDER WEDGE BASE T3.1/4 制造商:CML Innovative Technologies 功能描述:LAMP HOLDER, WEDGE BASE, T3.1/4 制造商:CML Innovative Technologies 功能描述:LAMP SOCKET, WEDGE, T3 1/4; Lamp Socket Size:T-3 1/4; Supply Voltage Range:60V; Accessory Type:Lamp Holder; For Use With:CML 10mm LEDs; Lamp Base Type:Wedge; Shell Material:Polycarbonate ;RoHS Compliant: Yes |
| LH10 | 制造商:SLI VCH 功能描述:LAMPHOLDER WEDGE BASE T3.1/4 |
| LH100 | 制造商:Thomas & Betts 功能描述:1 NPT BLACK CORD GRIP |
| LH1001-2R | 制造商:Power-One 功能描述:AC/DC Power Supply Single-OUT 5.1V 11A 70W 11-Pin 制造商:Power-One 功能描述:AC/DC PS SGL-OUT 5.1V 11A 70W - Bulk |
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