Quad Pulser Main Board

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The main board will need the following major components:

• (4) 8-channel ADC FMC boards
• (1) or possibly (2) control FMC boards
• (3) Enclustra Mars ​MX3 FPGA modules. One per 2 ADC boards, 1 for control
• (1) RJ-45 "magjack" type Ethernet connector per MX3 module
• Power supply input connector and voltage regulators as needed

It should fit in an enclosure like ​this one from Hammond (I was thinking of the 3.5 x 16.6 x 13 or 18 inch size)

Reference

• ​DDR2 SODIMM socket -- use one like this for the Enclustra MX3 modules

AX3 Wiring

• See ​Pin connection guidelines document. Note that this is a generic document which is not necessarily specific to the AX3
• See ​AX3_pinout.xlsx pinout of the AX3 module
• Power:
  • Can power with single 3.3V input to VCC_MOD and VCC_3V3 (see section 2.10.3 of the manual)
  • VCC_IO: can all be 2.5V? Need to think about this
    • Must be powered only when PWR_GOOD and PWR_EN are active. See p17 of the ​manual

Name	Description
PCLK_P/N	External clock, probably from G-2 experiment. Need a clock fanout chip to drive all 3 AX3 modules
IO_P/N	User I/Os. Most will be differential pairs routed from FMC connectors
MGT_xxx	N/C
JTAG_xxx	Route to 14 pin JTAG header (see p15 of ​DS593)
I2C_xxx	N/C
FLASH_xxx	N/C
BOOT_MODE	Removable jumper to GND
(other config pins)	N/C
USB_xxx	N/C
ETHx_xxx	Ethernet: connect to magjack
VCC_MOD, VCC_3V3	3.3V power
VCC_IO	2.5V or 3.3V ?
PWR_GOOD	Use to enable VCC_IO regulator

Ethernet

See page 8 of the ​PM3 Schematic. Use a Magjack like the ARJ-148 (Digikey). I think only 0.1uF capacitors to GND on each center-tap pin are needed, not the MOSFET circuit on the PM3 board.