Imported from GitHub: ucb-bar/rocket-pcb · commit 8a24312 · license Apache-2.0

Description

PCB libraries and templates for rocket-chip based FPGA/ASIC designs

README

PMOD_MICROSD

The Pmod MicroSD provides a microSD card slot to any board that has 3.3V logic and is pin compatible with a 12-pin Pmod port capable of SPI communication.

This board is specially designed to adapt to VCU118, and the pull-up resistor for SDIO is modified to 330 ohm.

Introduction

PMOD

This design complies with Digilent Pmod™ Interface Specification 1.2.0.

Note that the pin sequence numbers on the digilent PMOD specification are inconsistent with the PMOD pin sequence numbers of AMD VCU118 on the document. Essentially they are the same, but the numbering of AMD VCU118 uses a double-column staggered odd-even arrangement. Here is their mapping relationship.

PMOD PIN	VCU118 PIN	SDIO FUNCTION	SPI FUNCTION
1	1	DAT3(D3)	#CS
2	3	CMD	MOSI
3	5	DAT0(D0)	MISO
4	7	CLK	SCLK(SCK)
5	9	GND	GND
6	11	3P3V(VDD)	3P3V(VDD)
7	2	DAT1(D1)	NC
8	4	DAT2(D2)	NC
9	6	#DET(#CD)	#DET(#CD)
10	8	#WP	#WP
11	10	GND	GND
12	12	3P3V(VDD)	3P3V(VDD)

LED

There are two LEDs on the PCB, the yellow one is the card detection indicator and the orange one is the power indicator.

LED	COLOR	FUNCTION	ON	OFF
1	Yellow	Card detection indicator	MicroSD Card inserted	No MicroSD card
2	Orange	Power indicator	Power on	Power off

Special signal

Among them, the #WP signal is constant high level. If the WP signal is low, please check the power supply and there may be a fault.

NAME	HIGH	LOW
#DET(#CD)	No MicroSD card	MicroSD Card inserted
#WP	Write protect is off	This state is impossible

3D view

Top view

Bottom view

Preparation

Install kicad7, cmake, ninja.

Build

cmake -G Ninja -B build
cmake --build build

If you only need to generate a pdf of the schematic or pcb,

cmake --build build --target pdf

If you need to generate complete production data,

cmake --build build --target production