User:Ralf Moses/sandbox

The CRUVI FPGA Card is a daughter card standard specifically tailored to the needs of FPGAs.

Background

The expansion bus interface is designed to create an open ecosystem of function modules for high-performance peripheral connectivity. Its main focus is on supporting FPGA and FPGA SoC devices from all major manufacturers like Altera, Lattice, Microchip and Xilinx.

The word "CRUVI" is a combination of the Estonian word "KRUVI" for screw and the letter "C", which refers to the half of the hexagonal screw head. In this case, the "K" was replaced with "C" to emphasize the reference to the screw head.

Overview

It can be used to build high performance prototypes, for system integration and testing to build complex systems from smaller building blocks to iterate quickly and reduce cost. Create custom test systems for production functional testing. It´s a perfect platform for your next high-performance semiconductor evaluation boards and systems.

The carrier module supplies the power supply, the input/output voltage and controls the functions of the peripheral modules.

The CRUVI open standard coexists between low speed, low pin-count like Pmod Interface devices and high-performance, high pin-count (HPC), 400 I/O FPGA Mezzanine Card (FMC) peripherals.

Three board-to-board connectors are specified: CRUVI-LS (Low Speed), CRUVI-HS (High Speed) and CRUVI-GT (Gigabit Transceiver) PCIe Gen 5.0 capable.

Bridging adapter exists to convert signals from Pmod to CRUVI-LS (CR00025), from FMC to CRUVI-HS (CR00101, CR00111) and FMC to CRUVI-GT (CR00112).

History of CRUVI specification

International contributors to define the open source CRUVI specification are Trenz Electronic GmbH, Arrow Electronics, Samtec, Flinders University, Synaptic Laboratories Ltd, Symbiotic EDA and MicroFPGA UG.

History of CRUVI open source specification - FREE to use Apache License 2.0
Year	Version	Notes	Refs
2021	1.0.7 -alpha	first release
2024	2.0.1 -alpha	neu: CRUVI-GT (Gigabit Transceiver)	^[1]

Structure and description of the carrier modules

Single, double or triple width modules are allowed and they have more mounting holes.

A triple size of space on carrier board is 67.72 x 57.5 mm² (2.66535 x 2.26378 inch²). There are 3 slots. The mounting holes (1 to 6) for M2 screws are 2.2 mm (0.0866 inch) diameter and need SMD spacer for mechanically fixing. The CR99201 PCB template has LS and HS connectors named: AX, BY and CZ. The CR99500^[2] PCB template has LS, HS and GT connectors.

triple maximum size carrier board

It is recommended for all FPGA host boards with CRUVI slots provide LiteX platform support files.^[3]

Structure and description of the peripheral modules

There are different single peripheral module possible, flexible and scalable by size LS, HS and GT connectors. Mounting holes are for M2 screws 2.2 mm (0.0866 inch) diameter.

CRUVI connector specification

specification of connectors
	LS Low Speed	HS High Speed	GT Gigabit Transceiver
Carrier side connector	CLT-106-02-F-D-A-K	SS4-30-3.50-L-D-K	ADF6-20-03.5-L-4-2
3D STEP Model
Peripheral side connector	TMMH-106-04-F-DV-A-M	ST4-30-1.50-L-D-P	ADM6-20-01.5-L-4-2
3D STEP Model
Pin no	12 (6 per row)	60 (30 per row)	80 (20 per row)
pitch [mm] / [inch]	2 / 0.787	0.4 / 0.016	0.635 / 0.025
stacked height [mm] / [inch]	4.78 to 5.29 /0.188 to 0.208	5 / 0.197
speed rating [GHz] / [Gbps]	5.5 / 11	13.5 / 27 (single ended) 15.5 / 31 (differential)	32
Single ended I/O pins (VCCIO)	8	37 (28 adj.) + (9 fixed 3.3V)	8 + I2C
max. differential I/O	no	max. 12 LVDS	max. 4 lanes + REFCLK
Power Supply	adjustable, 3.3V, 5V
Current rating per pin [A]	4.1 (2-pin powered)	1.6 (2-pin powered)	1.34 (4-pin powered)
max. Temperatur range [°C]	-55 to 125

peripheral board specification

There are different single peripheral module possible, flexible and scalable by size LS, HS and GT connectors. Mounting holes are for M2 screws 2.2 mm (0.0866 inch) diameter.

It is recommended to have EEPROM with I2C for identification of peripheral module with a specific address number.

CRUVI peripheral boards
L x H [mm²] / [inch²]	speed	PCB template ^[4]	Note
14 x 14 / 0.55 x 0.55	LS	CR99001	identification EEPROM is included; This template is usefull for I2C, I3C, SPI sensor, I2S PDM MEMS microphones, programmable oscillator, ADC, DAC or SPI (QSPI) Flash memory device in BGA24 or SO-8 package.
14 x 14 / 0.55 x 0.55	LS	CR99002	same as CR99001 with added u.Fl connectors for I/O
22 x 32 / 0.87 x 1.2598	LS	CR99003	maximum size one-wide half-length, identification EEPROM is included
18 x 32 / 0.71 x 1.26	LS	CR99004	This template is usefull to convert into Pmod compatible connector (CR00005).
22 x 30 / 0.87 x 1.18	LS	CR99005	is half-length LS module with two SMA connectors
18 x 20 / 0.71 x 0.79	HS	CR99101	minimal size HS Module; good for HyperRAM or HyperFlash (CR00041), eMMC (CR00049) or loopback adapter for CRUVI-HS (CR00091)
22 x 57.5 / 0.87 x 2.26	HS	CR99102	maximum sized single-width HS module; good for signal test adapter to probed with scope or logic analyzer (CR00026), for high speed interfaces like USB-C, HDMI (CR00240), MIPI CSI/DSI, SDIO, xGMII Ethernet (CR0020x) and LVDS ADC (1 to 4 data lane)
	GT	CR99103	comming soon, good for HDMI output (CR00240), JESD204B ADC (CR00401), loopback adapter for CRUVI-GT (CR00092)

LS Low Speed, HS High Speed and GT Gigabit Transceiver connector

CRUVI connector specification
Connector	LS Low Speed	HS High Speed	GT Gigabit Transceiver
Carrier side connector	CLT-106-02-F-D-A-K	SS4-30-3.50-L-D-K	ADF6-20-03.5-L-4-2
Peripheral side connector	TMMH-106-04-F-DV-A-M	ST4-30-1.50-L-D-P	ADM6-20-01.5-L-4-2
Pin no	12 (6 per row)	60 (30 per row)	80 (20 per row)
pitch [mm] / [inch]	2 / 0.787	0.4 / 0.016	0.635 / 0.025
stacked height [mm] / [inch]	4.78 to 5.29 /0.188 to 0.208	5 / 0.197
speed rating [GHz] / [Gbps]	5.5 / 11	13.5 / 27 (single ended) 15.5 / 31 (differential)	32
Single ended I/O pins (VCCIO)	8	37 (28 adj.) + (9 fixed 3.3V)	8 + I2C
max. differential I/O	no	max. 12 LVDS	max. 4 lanes + REFCLK
Power Supply	adj., 3.3V, 5V
Current rating per pin [A]	4.1 (2-pin powered)	1.6 (2-pin powered)	1.34 (4-pin powered)
max. Temperatur range [°C]	-55 to 125

CRUVI-LS pinout and signal description

CRUVI-LS pinout and signal description
Pin	Primary	Signal	Pin	Primary	Signal
1	SDA	I2C(SDA), SMBUS(SDA)	7	D1	UART(RXD1), SD(D1), SPI(MISO), QSPI(D1), JTAG(TDI)
2	SCL	I2C(SCL), SMBUS(SCL)	8	CLK	UART(RTS), SD(CLK), SPI(CLK), QSPI(CLK), JTAG(TCK)
3	D3	UART(RST), SD(TXD0), QSPI(D3), JTAG(nRST)	9	D0	UART(TXD1), SD(D0), SPI(MOSI), QSPI(D0) JTAG(TDO)
4	SEL	UART(CTS), SD(CMD), SPI(SEL), QSPI(SEL), JTAG(TMS)	10	VCC	Power 3.3V
5	D2	SMBUS(INT), UART(RXD0), SD(D2), QSPI(D2), JTAG(RFU)	11	RFU	tbd
6	GND	Ground	12	VBUS	Power 5V

CRUVI-HS pinout and signal description

CRUVI-HS signal description
Pin	Primary Function	Note	Pin	Primary Function	Note	Pin	Primary Function	Note	Pin	Primary Function	Note
1	RFU1		16	A0_N	Transceiver I/O	31	GND	Ground	46	A5_N	Transceiver I/O
2	HSIO		17	B0_N	Transceiver I/O	32	A3_P		47	B5_N	Transceiver I/O
3	ALERT/IRQ		18	GND	Ground	33	B3_P	Transceiver I/O	48	GND	Ground
4	VCC	3,3V	19	GND	Ground	34	A3_N		49	GND	Ground
5	SDA		20	A1_P	Transceiver I/O	35	B3_N	Transceiver I/O	50	RFU2_P
6	HSO		21	B1_P	Transceiver I/O	36	VADJ	1.2 to 3.3V	51	DI/TDI	JTAG, SPI(MISO)
7	SCL		22	A1_N	Transceiver I/O	37	GND	Ground	52	RFU2_N
8	HSRST		23	B1_N	Transceiver I/O	38	A4_P	Transceiver I/O	53	DO/TDO	JTAG, SPI(MOSI)
9	VCC	3.3V	24	GND	Ground	39	B4_P	Transceiver I/O	54	GND	Ground
10	HSI		25	GND	Ground	40	A4_N	Transceiver I/O	55	SEL/TMS	JTAG, SPI(SEL)
11	REFCLK		26	A2_P		41	B4_N	Transceiver I/O	56	RFU_P
12	GND	Ground	27	B2_P	Transceiver I/O	42	GND	Ground	57	MODE	JTAG EN
13	GND	Ground	28	A2_N		43	GND	Ground	58	RFU_N
14	A0_P	Transceiver I/O	29	B2_N	Transceiver I/O	44	A5_P	Transceiver I/O	59	SCK/TCK	JTAG, SPI(CLK)
15	B0_P	Transceiver I/O	30	GND	Ground	45	B5_P	Transceiver I/O	60	VBUS	5V

CRUVI-GT pinout and signal description

CRUVI-GT signal description
Pin	Pin	Pin	Pin
1	21	41	61
2	22	42	62
3	23	43	63
4	24	44	64
5	25	45	65
6	26	46	66
7	27	47	67
8	28	48	68
9	29	49	69
10	30	50	70
11	31	51	71
12	32	52	72
13	33	53	73
14	34	54	74
15	35	55	75
16	36	56	76
17	37	57	77
18	38	58	78
19	39	59	79
20	40	60	80

References

^ "CRUVI specification v2.0.1 (2024)" (PDF). Retrieved 2024-05-17.
^ "PCB Vorlage CRUVI peripheral Module". Retrieved 2024-05-17.
^ "LiteX platform support files for FPGA host boards with CRUVI slots". Retrieved 2024-05-17.
^ "PCB template CRUVI peripheral boards". Retrieved 2023-12-19.

External links

[1] "CRUVI specification v2.0.1 (2024)" (PDF). Retrieved 2024-05-17.

[2] "PCB Vorlage CRUVI peripheral Module". Retrieved 2024-05-17.

[3] "LiteX platform support files for FPGA host boards with CRUVI slots". Retrieved 2024-05-17.

[Template_CRUVI_peripheral_board-4] "PCB template CRUVI peripheral boards". Retrieved 2023-12-19.

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