Difference between revisions of "Novena PVT2 ECO List"

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(ECO6: Upgrade accelerometer)
(ECO7: Upgrade FAN53540UCX)
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| U13N FAN533540UCX || U13N FAN53541UCX ||
 
| U13N FAN533540UCX || U13N FAN53541UCX ||
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==ECO8: Update i.MX6 P/N==
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Previously schematic listed the 1.0GHz P/N as the default. Updated to reflect the plan to only produce with the 1.2GHz P/N.
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{| class="wikitable sortable"
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! scope="col" | PVT1
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! scope="col" | PVT2
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! scope="col" | Notes
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| U100 iMX6Q - PCIMX6Q5EVT10AD || U100 iMX6Q - MCIMX6Q5EYM12AC ||
 
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Revision as of 10:13, 30 June 2014

This is a list of all the changes applied to the board from PVT1 to PVT2 (Crowd Supply initial campaign) release. If it's not on this list, it didn't happen.

Each change has the format of issue summary/resolution, and specific change

ECO1: Improve HPD margin

HPD on i.MX6 has a low impedance (10k). This causes marginal HPD performance on some boards. Make R29L stronger.

PVT1 PVT2 Notes
R29L 10k, 1% / REC1005N R29L 1k, 1% HDMI HPD perforance

ECO2: EOL issue U11D

STMPE610 is EOL. Switch to STMPE811, pin-compatible and not EOL.

PVT1 PVT2 Notes
U11D STMPE610 U11D STMPE811QTR resolve EOL issue

ECO3: EOL issue audio amplifier

NS4890 is EOL. Replace with compatible NS4890B in two places.

PVT1 PVT2 Notes
U10A, U12A NS4890 U10A, U12A NS4890B resolve EOL issue

ECO4: Improve kernel panic logging

U10S is too small for good kernel panic logging. Replace with larger capacity I2C EEPROM to store several crashes worth of logs.

PVT1 PVT2 Notes
U10S 24LC32A-I/ST U10S FT24C512AUTR-T improve KP logging

ECO5: 47uF 1206 capacitor is wrong AGAIN

The wrong package type (1210) is being ordered for this 1206 part. This was supposed to be corrected on PVT1. Please double-confirm that instruction is understood that this part cannot be substituted with a 1210 footprint.

DVT and PVT1 PVT2 Notes
C43M 47uF, 6.3V, 20% X5R 47uF, 6.3V, 20% X5R (CL31A476MQHNNNE) double-confirm this change is understood!
C44M 47uF, 6.3V, 20% X5R 47uF, 6.3V, 20% X5R (CL31A476MQHNNNE)
C45M 47uF, 6.3V, 20% X5R 47uF, 6.3V, 20% X5R (CL31A476MQHNNNE)
C18M 47uF, 6.3V, 20% X5R 47uF, 6.3V, 20% X5R (CL31A476MQHNNNE)
C52C 47uF, 6.3V, 20% X5R 47uF, 6.3V, 20% X5R (CL31A476MQHNNNE)

ECO6: Upgrade accelerometer

Old accelerometer is probably approaching EOL.

MMA8452Q is stocked at 3mm+ levels in the factory and has existing Linux drivers in main-line. A little more expensive than MMA8653FC, but twenty cents is not going to kill this product. So, we go with MMA8452Q.

PVT1 PVT2 Notes
U10D MMA7455L U10D MMA8452Q improve accelerometer, avoid EOL
R17D 20k, 1% removed INT output is now push/pull

ECO7: Upgrade FAN53540UCX

FAN53540UCX marked as not recommended for new designs.

FAN53541UCX is a pin-compatible upgrade. Difference between the two is that the enable and mode input no longer need 1k ballast resistors. However, leaving them in place causes no harm and allows for downgrade compatibility in case parts are in short supply.

PVT1 PVT2 Notes
U13N FAN533540UCX U13N FAN53541UCX

ECO8: Update i.MX6 P/N

Previously schematic listed the 1.0GHz P/N as the default. Updated to reflect the plan to only produce with the 1.2GHz P/N.

PVT1 PVT2 Notes
U100 iMX6Q - PCIMX6Q5EVT10AD U100 iMX6Q - MCIMX6Q5EYM12AC