The design of a printed circuit board is based on the circuit schematic and implements the functions required by the user of the circuit. The design of a printed circuit board mainly refers to the layout design, which requires various factors such as internal electronic components, metal connections, layout of through-holes and external connections, electromagnetic protection, thermal dissipation, crosstalk and so on.
Classification of printed circuit boards
1. Single-sided
In the most basic PCB, the parts are concentrated on one side and the wires are concentrated on the other side. Because the wires only appear in one side, so this PCB is called single-sided (Single-sided). Because single-sided in the design of the line has many strict restrictions (because only one side, the wiring can not cross between and must be around a separate path), so only the early circuit use this type of board.
2. Double-sided
This type of board has wiring on both sides, but in order to use the wires on both sides, there must be a proper circuit connection between the two sides. The “bridge” between such circuits is called a via. A via is a small hole in the PCB, filled or coated with metal, which can be connected to the wires on both sides.
3, multilayer boards
In order to increase the area that can be wired, multilayer boards use more single or double-sided wiring board.
With a double-sided as the inner layer, two single-sided as the outer layer or two double-sided as the inner layer, two single-sided as the outer layer of the printed circuit board, through the positioning system and insulation bonding material alternately together and conductive graphics according to the design requirements of the interconnection of the printed circuit board will become a four-layer, six-layer printed circuit board, also known as multilayer printed circuit board.
| IS200BPIIH1A |
| IS200DSPXH1C |
| IS200DSFCG1A |
| IS200BPIBG1A |
| IS200DSPXH2D |
| IS200DSPXH1B |
| IS200DAMEG1A |
| IS200BAIAH1B |
| IS200VAICH1D |
| IS200ISBBG2A |
| IS200HFPAG1A |
| IS200CABPG1B |
| IS200VTCCH1C |
| IS200DSFCG1AEB |
| IS200DAMAG1BCB |
| IS200ISBBG1AAB |
| IS200GGXIG1AFE |
| IS200HFPAG2ADC |
| IS200GGXDG1ABB |
| IS200BPIAG1AEB |
Functional Features
Microprocessor:The VMIVME-7807 is based on the Pentium M
processor family. The enhanced 1.1 GHz and 1.6 GHz Pentium M
processors have 1 megabyte of L2 cache, while the 1.8 GHz Pentium M
processors have 2 megabytes of L2 cache. The Pentium M processor family
Offers thermal characteristics well suited to embedded
systems operating over a wide temperature range.
DRAM memory:The VMIVME-7807 supports DDR SDRAM and
optional ECC support up to 1.5 GB. this
SDRAM is dual-ported on the VMEbus.
BIOS:The system and video BIOS is provided in the form of reprogrammable flash
memory.
Ethernet controller:The VMIVME-7807 provides connectivity for
10/100 megabyte LAN using the Intel 82551ER Ethernet controller. A
standard RJ45 connector is provided on the front panel with a network
status indicator. The second Ethernet interface is a dual Gigabit
Ethernet (Intel 82546EB ), one routed to the front panel and the other to
to the base plate using the P2 connector. Two Gigabit Ethernet
Xiamen Xiongba Electronic Commerce Co. LTD
FROM：Mr. Wei
E-Mail：2322181769@qq.com
TEL/WeChat:15396237607
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