TAG3 Serial Flash Configuration
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This BLOG is a short introduction for configuring the TAG3 board for use with the Serial FLASH.
This information is taken from our TAG3 document Manual : The specified document was not found. and our Quick Start Guide The specified document was not found.
1. The TAG3 board contains a Serial FLASH device and can be configured with a few resistor modifications and additions:
See the TAG3 Board below:
2. TAG3 Board Assembly displaying the resistor installation/modifications for the on board Serial FLASH:
3. The table below defines the resistors to configure the Serial FLASH:
4. You will need to place the SW4 switches 5,6,7,8 in the OFF position (They are actually show in the ON Position in this photo):
5. In the SDK you will need to modify your Make Target to include NV=SFLASH:
Note: In this case we have used COM Port 21 as observed in our Windows Device Manager:
5. Using the Recovery Procedure from the The specified document was not found. document, your recovering console message should look like the following:
A few extra notes about Serial FLASH:
You will need to use the same Macronix Serial Flash that is supported by the ROM and ships on the TAG3 board. Please see the schematic snippet below:
The Macronix MX25U4033 device works as well if you needed a second option.
Please see the notes below:
MX25U4033: https://www.macronix.com/en-us/products/NOR-Flash/Serial-NOR-Flash/Pages/spec.aspx?p=MX25U4033E&m=Se... (good for new designs)
MX25U4035: https://www.macronix.com/en-us/products/NOR-Flash/Serial-NOR-Flash/Pages/spec.aspx?p=MX25U4035&m=Ser... (not recommended for new designs)
Regarding the two different Flash PNs, here’s a document from the Macronix website that compares the two:
https://www.macronix.com/Lists/ApplicationNote/Attachments/1872/AN126V1_MX25U4035%20to%204033E.pdf
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Very nice! Thank you sir JT.
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What's the value for the R100 and R101"install" ?
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Per the schematic in the back of the Hardware User Guide (SDK 2.x and TAG3 Board), I believe these are 0 Ohm DNI resistors.
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For EEPROM, R100 and R101 are DNI, 0 Ohm. But for the Serial Flash, they are "Install", I need to know the "Install" value, the resistor size... Thank you!
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Hi mwf_mmfae,
Thank you very much!
Ellen
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Hello Ellen,
The "Install" value is a 0 Ohm resistor.
Thanks
JT
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Hi JT,
Thank you very much!
Do you have BCM20737A1KML2G datasheet? I could not find it in the Broadcom website.
Best regards,
Ellen
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Here you go: BCM20737 SOC Data Sheet
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Thank you so much mwf_mmfae !
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