1. Power Consumption Change Requests
January 2995
doc.: IEEE /1215r1
January 2006
Date:
Power Consumption Change Requests
Authors:
Name
Company
Address
Phone
Craig Warren
Freescale
16644 West Bernardo Drive
San Diego ca
ext 1438
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Craig Warren Freescale
DJ Shyy, MITRE

2. January 2995
doc.: IEEE /1215r1
January 2006
Introduction
This document will cover some change requests to the existing methodology 6.16 Power Consumption. The way it is written it wont allow users that are doing low power consumption to be able to test.
Another issue is to make some generic statements so however one decides to measure I, V it will be acceptable.
Lastly, adding some modifiers to make the test more inclusive.
Craig Warren Freescale
DJ Shyy, MITRE

3. January 2995
doc.: IEEE /1215r1
January 2006
Change Requests
6.16 Power consumption Not everyone will want to use an Oscilloscope to measure voltage and current with.
Remove all instances of Oscilloscope throughout Paragraph 6.16 and replace with the text with Current / Voltage Measurement Device with a sample rate of less than or equal to 1mS. The reason for doing this is to make it more generic.
Change figure is Under change Figure 53 block marked test controller from “ Control of Digital Oscilloscope” to“Control of voltage and current measurement device”.
In Figure 53 change the block marked “Digital Oscilloscope” to be Current and Voltage measurement device.
Craig Warren Freescale
DJ Shyy, MITRE

4. Change Requests 6.16.2.4 Special capabilities necessary for this test
January 2995
doc.: IEEE /1215r1
January 2006
Change Requests
Special capabilities necessary for this test
change the Block Diagram in Figure 55 not to be PS Battery but supply voltage from the interface bus “be it mPCI, PCI, Compact Flash, SDIO ect…Again more generic.
Also change this to be more generic in configuration not all methods are used with probe.
Some Vendors use extenders that breakout the V signals and have the capacity to feed that into a high sampling meter 2 channels. So Remove all reference to probe points and replace with measurement insertion locations.
Remove any reference to current probe /probes utilization and replace with Current measurement device. “Testing could be done in various methods like bed of nails, extender cards with feed through ect…
Craig Warren Freescale
DJ Shyy, MITRE

5. January 2995
doc.: IEEE /1215r1
January 2006
Change Requests
Permissible error margins and reliability of test
Change the expected error margins for the test results are as follows, depending on the operation mode:
Remove “The oscilloscope probes should be calibrated such that voltage measurement accuracy is less than 10 mV and the current measurement accuracy is less than 0.5 mA.”
Replace with “The I/V measurement device should be calibrated such that voltage measurement accuracy is less than 1% of measured voltage and the current measurement accuracy is less than 5% of measured current”
Craig Warren Freescale
DJ Shyy, MITRE

6. Change Requests Add the following Modifiers to 6.16.3.1.2:
January 2995
doc.: IEEE /1215r1
January 2006
Change Requests
Add the following Modifiers to :
Beacon Interval mS “need to find what the TU are”
Data Rates B=1-11, G=1-54, A=6-54
Should be forced so each modulation scheme can be measured. Reason for this is Average consumption for someone sitting at a 6mbps rate transferring a large file vs someone sitting at 54mbps distance transferring a large file. 6mbps is on longer and thus TX and RX longer between idle time. In these user case scenarios are we measuring the right thing should we be measuring current per bit?
Zoom view
Definition of Zoom view is a high sample resolution view of the current consumption trace over short duration of time.
Add comment “ if test is intended to enable this feature a sample rate of less than 1mS shall be used and continuous data shall be represented in graph form.
Craig Warren Freescale
DJ Shyy, MITRE

7. Discussion points ? Issues or concerns? January 2006 January 2995
doc.: IEEE /1215r1
January 2006
Discussion points ?
Issues or concerns?
Craig Warren Freescale
DJ Shyy, MITRE