Talk:Notes on using the OLPC developer boards: Difference between revisions
JordanCrouse (talk | contribs) (Fixed) |
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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? All questions are in italics. Pinout is wanted on a few connectors. |
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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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* The '''front''' of the board is the side with the VGA connector and the Geode processor. |
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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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* Do NOT confuse J1 with CN9! You will fry the audio! |
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===Back of board=== |
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* CN1: JTAG Connector for Marvell wireless chip. |
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* CN2: Old LCD Connector. Definition changing. |
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* CN3: External stereo audio line output (switched) |
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* CN4: USB |
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* CN5: External mono microphone connector (switched) |
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* CN6: USB |
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* CN7: USB |
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* CN8: Mono right side speaker connector (Pin 1: Right +, 2: Right -) |
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* CN9: Internal stereo speaker connector (Pin 1: Left -, 2: Left +, 3: Right -, 4: Right +) |
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* CN10: No longer exists (2-pin CN9 and CN10 were combined to 4-pin CN9) |
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* CN11: DC input jack (10V-24V; nominal 12V) Center positive. |
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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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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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===Front of board=== |
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--[[User:Yangman|Yangman]] 14:56, 5 July 2006 (EDT) |
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* CN12: CRT |
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* CON_ANT1: U.FL connector for left? antenna |
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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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* CON_ANT2: U.FL connector for right? antenna |
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--[[User:Quozl|Quozl]] 19:33, 5 July 2006 (EDT) |
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* CN13: ''opposite side of CN14?'' |
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* CN14: Used for DCON Debugging. Definition changing. |
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Ah, so it literally is canning, like I suspected, and not some jargon. Thanks. |
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* CN15: Internal microphone connector ''pinout?'' |
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--[[User:Yangman|Yangman]] 01:58, 6 July 2006 (EDT) |
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* CN16: AMD Geode JTAG Connector |
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* CN17: Used for DCON Debugging. Definition changing. |
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== Please fix the LinuxBIOS discussion in this page == |
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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 any other valid settings?'' |
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Please fix the LinuxBIOS discussion which is out of date. |
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* CN19: Unused and unsoldered jumper. |
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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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* CN20: Used for manufacturing (serial Flash programming) ''pinout?'' |
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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)