Talk:Notes on using the OLPC developer boards: Difference between revisions
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Connector/LED documentation moved to main article. |
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Where are the specifications for the rest of the connectors on the board? |
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The only two I've discerned from the Wiki so far are the obvious ones: |
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* IO for serial breakout (U20? numbering unclear) |
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* CON_ANT1 |
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* CON_ANT2 |
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* USB: CN4, CN6, CN7 |
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---- |
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Some of the development board photos show PS keyboard/mouse wired in, where would those connect? |
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To CN23 - the pinout is shown below. |
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Excuse my ignorance, but what exactly <em>is</em> "canning" in the context of wireless hardware? I'm not completely foreign to electronics and associated jargons, but being involved with OLCP is the first time I've heard the term used in such a context. |
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Could somebody also identify the connector type for the antenna? |
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--[[User:Yangman|Yangman]] 14:56, 5 July 2006 (EDT) |
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These are U.FL connectors. |
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Canning is RF encapsulation. It means putting a shield around the RF (radio frequency) components. You'll see on the board a copper border around the wireless space. A metal shield, in the form of a box with one side missing, is placed over this area, and soldered down. An RF shield decreases noise received, decreases noise emitted, and therefore increases range of the wireless circuit and antenna. It also helps the device to meet electromagnetic compatibility regulations, or other regulations concerning radios. |
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'''Connectors/LEDs''' |
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--[[User:Quozl|Quozl]] 19:33, 5 July 2006 (EDT) |
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Ah, so it literally is canning, like I suspected, and not some jargon. Thanks. |
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* CN1: JTAG Connector for Marvell wireless chip. |
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--[[User:Yangman|Yangman]] 01:58, 6 July 2006 (EDT) |
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* CN2: Old LCD Connector. Definition changing. |
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* CN8: Mono right side speaker connector |
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* CN9: Internal stereo speaker connector |
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* CN14: Used for DCON Debugging. Definition changing. |
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* CN15: Internal microphone connector |
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* CN16: AMD Geode JTAG Connector |
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* CN17: Used for DCON Debugging. Definition changing. |
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* CN18: CRT/LCD Jumper |
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* CN19: Unused |
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* CN20: Used for manufacturing (serial Flash programming) |
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* CN21: Battery connector (Pin 1: Gnd, 2: VBat) |
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* CN22: Battery sensor. Definition changing. |
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* CN23: Internal PS/2 Connector to keyboard & input module (Pin 1: TP Data, 2: TP Clk, 3: Gnd, 4: KB Data, 5: KB Clk, 6: Power [3.3V or 5V]) |
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* CN??: Unused large solder pads (was mini-PCI on pre-A-Test boards) |
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* D2: LED. Definition changing. |
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* D3: LED. Definition changing. |
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* D4: LED. Definition changing. |
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* D21: LED. Definition changing. Same output as D3 (front/back view) |
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* D22: LED. Definition changing. Same output as D2 (front/back view) |
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* D23: LED. Definition changing. Same output as D4 (front/back view) |
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== Please fix the LinuxBIOS discussion in this page == |
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'''NOTE: Just because it doesn't say it's changing above, doesn't mean that it won't change!''' |
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Please fix the LinuxBIOS discussion which is out of date. |
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: Done - thanks. - [[User:JordanCrouse|JordanCrouse]] ([[User talk:JordanCrouse|Talk to me!]]) 12:32, 14 September 2006 (EDT) |
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Latest revision as of 16:32, 14 September 2006
Connector/LED documentation moved to main article.
Excuse my ignorance, but what exactly is "canning" in the context of wireless hardware? I'm not completely foreign to electronics and associated jargons, but being involved with OLCP is the first time I've heard the term used in such a context. --Yangman 14:56, 5 July 2006 (EDT)
Canning is RF encapsulation. It means putting a shield around the RF (radio frequency) components. You'll see on the board a copper border around the wireless space. A metal shield, in the form of a box with one side missing, is placed over this area, and soldered down. An RF shield decreases noise received, decreases noise emitted, and therefore increases range of the wireless circuit and antenna. It also helps the device to meet electromagnetic compatibility regulations, or other regulations concerning radios. --Quozl 19:33, 5 July 2006 (EDT)
Ah, so it literally is canning, like I suspected, and not some jargon. Thanks. --Yangman 01:58, 6 July 2006 (EDT)
Please fix the LinuxBIOS discussion in this page
Please fix the LinuxBIOS discussion which is out of date.
- Done - thanks. - JordanCrouse (Talk to me!) 12:32, 14 September 2006 (EDT)