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EFC cannot work standalone in EEM variant #43

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Tracked by #53
marmeladapk opened this issue Oct 14, 2022 · 4 comments
Closed
Tracked by #53

EFC cannot work standalone in EEM variant #43

marmeladapk opened this issue Oct 14, 2022 · 4 comments

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@marmeladapk
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marmeladapk commented Oct 14, 2022 •
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Due to lack of P3V3 MP.

Probably IC14 should be present in both variants with logic that disables it if P3V3_MP from EEM connector is present.
@gkasprow
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gkasprow commented Oct 14, 2022 •
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EEM in stand-alone mode can also work as a controller so let's populate it by default. Maybe add a Schottky diode instead of R278

@marmeladapk
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Additionally after enabling servmod with no P3V3_MP I2C bus will be stuck low.

@gkasprow
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gkasprow commented Jul 26, 2023 •
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For some unknown reason somebody removed SERVMOD activated I2C switch. It was there in initial version of EEM-DIOT adapters. I2C bus is shared among the chassis so all EEPROMs are now connected in parallel.

@gkasprow
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the specification says
image

@maciejprzybysz maciejprzybysz mentioned this issue Sep 14, 2023
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M1ch4U pushed a commit that referenced this issue Nov 16, 2023
v1.1rc1
a1196d7 
- Fixed parts availability ISSUE #38
- In FPGA_SDRAM.SchDoc NCP51145PDR2G changed to NCP51200MNTXG	ISSUE #39
- In EEM_Connectors_JTAG.SchDoc I2C enabling IC added 	ISSUE #40
- In Power_Supplies.SchDoc IC14 enabled in EEMvariant, R278 changed to Schottky diode.  ISSUE #43
- R80 and R79 changed to 1k, added DIP switch ISSUE #44
- In IC2 pins 6 and 7 disconected ISSUE #45
- In IC10 GPB7 and GPB0 swapped ISSUE #46
- Board shape change, left LEDs SMA mounting holes, right connectors, J10, J11 moved, SMA changed to delock  #47
- R3 changed to 1k ISSUE #48
- Board extended from panel side, LD15 changed ISSUE #49
- Migration from 100T to 200T ISSUE #51
- C103 changed to 680u
- 4.7uF caps in VCCINT increased amount from 6 to 12
- 470nF caps in VCCINT increased amount from 8 to 14
- 470nF caps in VCCBRAM increased amount to from 2 to 3
- Pin delays in 200T added
- FMC position fixed ISSUE #52
- LVDS diffpairs adjusted
- GND vias added near LVDS that changes reference
- vias moved under L26
- On L2 polygon under diff pairs changed (12V, 3V3)
- Impedance control added
- DDR trace width unified to meet impedance control requirements
- Front panel 3D model updated
- Variants updated
- PDN simulation added
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@gkasprow @marmeladapk @maciejprzybysz