XO1.75 A3 Tinderbox: Difference between revisions

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{{OLPC}}
This page describes the [[Tinderbox Power]] setup for the [[XO_1.75_A3|XO-1.75 A3]] prototype.
This page describes the [[Tinderbox Power]] setup for the [[XO_1.75_A3|XO-1.75 A3]] prototype.

==Readings==

'''It must be emphasized that these power measurements are a starting point!''' They will be improved (hopefully by leaps and bounds !) They are already a good improvement, in terms of power supply efficiency, over the [http://dev.laptop.org/~wad/xo1.75_a1/ A1/A2 numbers].

Example readings from the XO-1.75 A3 Tinderbox include:

* [http://dev.laptop.org/~wad/xo1.75_a3/linux_idle2.html Linux when Idle]
* [http://dev.laptop.org/~wad/xo1.75_a3/linux_sd_write2.html Linux writing to the SD]
* [http://dev.laptop.org/~wad/xo1.75_a3/usb_key.html Linux w. USB key inserted]
* [http://dev.laptop.org/~wad/xo1.75_a3/usb_key_read.html Linux reading from a USB key]
* [http://dev.laptop.org/~wad/xo1.75_a3/usb_0.5A.html 2.5W drawn from USB]
* Others are at [http://dev.laptop.org/~wad/xo1.75_a3/ http://dev.laptop.org/~wad/xo1.75_a3/]


==Channels==
==Channels==
Line 51: Line 65:
| 20 || +5V USB || U9.7,8 || 0.050
| 20 || +5V USB || U9.7,8 || 0.050
|- align="center"
|- align="center"
| 21 || ? || ||
| 21 || BL in || PR16 || 0.050
|- align="center"
| 22 || LCD Analog in || PL2 || 0.100
|- align="center"
| 23 || +1.8V LCD || PQ22.1 || 0.100
|- align="center"
| 24 || +1.8V DCON || PQ21.1 || 0.100
|- align="center"
| 25 || +3.3V DCON || SP1 || 0.100
|- align="center"
| 26 || +1.2V out || PJP13 || 0.100
|- align="center"
| 27 || +2.5V out || PJP1 || 0.100
|- align="center"
| 28 || +3.3V USB || PQ24.1 || 0.100
|- align="center"
| 29 || +3.3V WLAN || Q15.3 || 0.100
|- align="center"
| 30 || +1.8V WLAN || Q11.1 || 0.100
|- align="center"
| 31 || +3.3V eMMC || R290 & R314 || 0.100
|- align="center"
| 32 || +3.3V Audio || L26 & L44 || 0.100
|- align="center"
| 33 || || || 0.100
|}
|}


They are described to the [[Tinderbox_Power#Measurement|tinderbox power measurement software]] by the [http://dev.laptop.org/~wad/xo1.75_a3/cl2_a3.csv cl2_a3.csv] file.
They are described to the [[Tinderbox_Power#Measurement|tinderbox power measurement software]] by the [http://dev.laptop.org/~wad/xo1.75_a3/cl2_a3.csv cl2_a3.csv] file.


[[XO-1.75]]
[[Category:XO-1.75]]
[[Hardware]]
[[Category:Hardware]]

Latest revision as of 15:51, 11 August 2011

  This page is monitored by the OLPC team.

This page describes the Tinderbox Power setup for the XO-1.75 A3 prototype.

Readings

It must be emphasized that these power measurements are a starting point! They will be improved (hopefully by leaps and bounds !) They are already a good improvement, in terms of power supply efficiency, over the A1/A2 numbers.

Example readings from the XO-1.75 A3 Tinderbox include:

Channels

These are the channels wired up to the Aligent 34980A voltmeter.

Channel Name Connection Resistance
1 DC In PF1 0.056
2 Vin PJP16 0.010
3 Vcore in PJP12 0.050
4 Vcore out PJP8 0.010
5 +3.3VSUS in PJP15 0.100
6 +3.3VSUS out PJP10 0.025
7 +3.3V EC R262 0.100
8 +1.5V in PJP2 0.047
9 +1.5V out PJP3 0.025
10 Vterm PJP4 0.047
11 +1.8V in PJP14 0.100
12 +1.8V out PJP11 0.033
13 DC In PF1 Voltage
14 Vin PJP6 Voltage
15 Vcore PJP8 Voltage
16 +3.3V in PJP7 0.100
17 +3.3V out PJP9 0.033
18 +5V in PJP6 0.100
19 +5V out PJP5 0.033
20 +5V USB U9.7,8 0.050
21 BL in PR16 0.050
22 LCD Analog in PL2 0.100
23 +1.8V LCD PQ22.1 0.100
24 +1.8V DCON PQ21.1 0.100
25 +3.3V DCON SP1 0.100
26 +1.2V out PJP13 0.100
27 +2.5V out PJP1 0.100
28 +3.3V USB PQ24.1 0.100
29 +3.3V WLAN Q15.3 0.100
30 +1.8V WLAN Q11.1 0.100
31 +3.3V eMMC R290 & R314 0.100
32 +3.3V Audio L26 & L44 0.100
33 0.100

They are described to the tinderbox power measurement software by the cl2_a3.csv file.

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