2019-05-20

(Eric+Thiago): IPMC can now control 12V. Also, in ATCA shelf the 12V gets switched on as it should at power-up.

(Eric): Working on SM 003: Assembled new "pseudo backplane" board. Jumpered for address 0x43 ("slot 3") by cutting jumpers 0, 1, 6. Power up using old Lambda 40V PS set to maximum (ATCA PIM min Vin is 36V). Now I can ping the IPMC at 192.168.1.34 ! Leaving it on and connected; Thiago may be working remotely.

Notes on slot address setting:

According to the ​CERN IPMC page the slot numbers are 0x41...0x50 for ATCA slots 1...16. The corresponding IP addresses should be 192.168.1.20...192.168.1.35. This feature is currently not working. Also, 0x43 and 0x45 are the only slot addresses currently known to work (and they give the default IP address 192.168.1.34).

2019-05-15

Issues:

• 220uF caps should get smaller (physically, too tall)
• Remember to populate R50 with CERN IPMC value.
• We should add a pull-down to U15 pin 1 for when we have no IPMC (added on board 1)
• We should add a pull-up to ETH_SW_RESET_N (Has on-board pull-up, so we are OK)
• Traces under mounting splice plate holes

Notes:

• No IPMC/Switch/Zynq => 48V@ ~60mA
• 3.3V and 12V => ~120mA
• Powering up 3.3/1.8V regs gives ~200mA
• Powering up with 3.3/1.8V + zynq 3.3/1.8 and 12V gives 230mA