HyperRAM connections

• jumper wires https://www.amazon.co.uk/Elegoo-120pcs-Multicolored-Breadboard-arduino-colorful/dp/B01EV70C78/
• Note that cables have to be really short, they may need to be constructed and soldered https://www.amazon.co.uk/HALJIA-2-54mm-Dupont-Jumper-Connectors/dp/B06WWB66WL/
• nmigen hyperram.py module
• Winbond Datasheet for Quad 1bitsqared PMOD: https://ftp.libre-soc.org/W956x8MBYA_64Mb_HyperBus_pSRAM_TFBGA24_datasheet_A01-005_20211208.pdf
• Winbond Verilog Model for W956A8MBY: https://www.winbond.com/resource-files/W956x8MBY_verilog_p.zip
• HyperRAM
• https://github.com/icebreaker-fpga/icebreaker-pmod/tree/master/quadhyperram
• https://hackaday.io/project/168594-feather-wing-pmod-adapter https://github.com/TomKeddie/prj-pmod-feather

from nmigen.resources.memory import HyperRAMResources
hyperram_ios = HyperRAMResources(cs_n="B13 C13 A12 A13",
                                 dq="E14 C11 B10 E12 D12 A9 D11 D14",
                                 rwds="C14", rst_n="E13", clk_p="D13",
                                 clk_n="A14", # only in DDR mode
                                 attrs=IOStandard("LVCMOS33"))
self.platform.add_extension(hyperram_ios)
io = self.platform.request("hyperram")
hyperram = HyperRAM(io=io, phy_kls=HyperRAMPHY,
                    latency=7) # Winbond W956D8MBYA
                               # latency=6 for Cypress S27KL0641DABHI020

1bitsquared HyperRAM PMOD

• https://1bitsquared.de/products/pmod-hyperram

VERSA ECP5 Connections

Table of connections:

Digilent Arty a7-100t Connections

See https://digilent.com/reference/_media/reference/programmable-logic/arty/arty_rm.pdf