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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Could somebody complete this (CN10, CN13, CN18, CN21, CN23 need info/confirmation), and move it to the main page? |
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---- |
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==Connectors/LEDs== |
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* All of these numbers are allocated starting top left corner, allocated in scanline fashion. |
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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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* The '''front''' of the board is the side with the VGA connector and the Geode processor. |
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--[[User:Yangman|Yangman]] 14:56, 5 July 2006 (EDT) |
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===Warnings=== |
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* '''Just because it doesn't say it's changing, doesn't mean that it won't change!''' |
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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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* Do NOT confuse J1 with CN9! You will fry the audio! |
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--[[User:Quozl|Quozl]] 19:33, 5 July 2006 (EDT) |
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===Back of board=== |
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* CN1: JTAG Connector for Marvell wireless chip. |
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Ah, so it literally is canning, like I suspected, and not some jargon. Thanks. |
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* CN2: Old LCD Connector. Definition changing. |
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--[[User:Yangman|Yangman]] 01:58, 6 July 2006 (EDT) |
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* CN3: External stereo audio line output (switched) |
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* CN4: USB |
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== Please fix the LinuxBIOS discussion in this page == |
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* CN5: External mono microphone connector (switched) |
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* CN6: USB |
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Please fix the LinuxBIOS discussion which is out of date. |
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* CN7: USB |
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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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* CN8: Mono right side speaker connector |
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* CN9: Internal stereo speaker connector |
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* CN10: ''where is it? does it even exist?'' |
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* CN11: DC input jack (10V-24V; nominal 12V) |
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* CON1: Unused large solder pads (was mini-PCI on pre-A-Test boards) |
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* D2: LED. Definition changing. Same output as D22 (front/back view). |
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* D3: LED. Definition changing. Same output as D21 (front/back view). |
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* D4: LED. Definition changing. Same output as D23 (front/back view). |
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===Front of board=== |
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* CN12: CRT |
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* CON_ANT1: U.FL connector for left? antenna |
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* CON_ANT2: U.FL connector for right? antenna |
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* CN13: ''opposite side of CN14?'' |
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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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* J1: Serial port connector. 3.3V levels. (Pin 1: 3.3V Power, 2: TxD, 3: RxD, 4: Gnd) |
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* CN18: CRT/LCD Jumper - ''1/3=CRT 2/4=LCD confirmation needed'' |
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* CN19: Unused and unsoldered jumper. |
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* CN20: Used for manufacturing (serial Flash programming) |
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* CN21: Battery connector (Pin 1: Gnd, 2: VBat ''what voltage levels?'') |
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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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* 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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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)