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Graphics card rev-2

ShaneTWilliams·worlds-worst-graphics-card·hardware/rev-2/graphics-card-rev-2.kicad_pcb

Graphics card rev-2 PCB layout, top view — open source STM32 board by ShaneTWilliams
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About the Graphics card rev-2 PCB

Graphics card rev-2 is an open source STM32 PCB design by ShaneTWilliams, published on GitHub under the MIT license. It is a 4-layer board measuring 72.9 × 61.3 mm, with 113 components from 39 distinct parts.

Its main chip is the STM32H745IITx, from the STM32 family. Other key parts include the IS42S16400J-7TL, TPS613222ADBVR, ZLDO1117G33TA, ZLDO1117G12TA and SiI1136. By type, the board carries 67 capacitors, 22 resistors, 9 diodes, 6 ICs, 4 inductors and 3 connectors.

From the project

Custom HDMI transmitter PCB with 480 MHz STM32H7 microcontroller

This board consists of an SiI1136 HDMI transmitter, driven by a dual-core 480 MHz STM32H745IIT6 microcontroller, with 64 MB of external SDRAM. It is USB-powered and uses SWD for flash and debug.

The goal of this project is to give me a custom, bare-metal platform on which I can try my hand at implementing simple graphics algorithms from scratch. The STM32 is key for this, with its dual cores, DMA2D (a DMA peripheral designed to fill frame buffers very quickly) and its LTDC peripheral, which will drive the display without any CPU load.

Graphics card rev-2, from the project README
From the project README

Main components on the Graphics card rev-2

IS42S16400J-7TLTPS613222ADBVRZLDO1117G33TAZLDO1117G12TASiI1136STM32H745IITx

Graphics card rev-2 bill of materials (BOM)

113 components, 39 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
IS42S16400J-7TL
U1
1
TPS613222ADBVR
U2
1
ZLDO1117G33TA
U3
1
ZLDO1117G12TA
U4
1
SiI1136
U5
1
STM32H745IITx
U6
1
ZXMN2A01F
Q1
1
40MHZ/8PF
Y1
2
USB_B_Micro
J1, J2
1
Conn_02x03_Odd_Even
J4
1
5V_LED
D1
1
3V3_LED
D2
1
LED_IND0
D3
1
LED_IND1
D4
1
LED_IND2
D5
1
LED_OK
D6
1
1V2_LED
D7
1
LED_WARN
D8
1
LED_ERR
D9
3
1k@100MHz
FB1, FB2, FB3
Show 19 more
QtyPartRefs
1
4.7u
L1
3
1u
C1, C48, C50
6
4.7u
C2, C13, C57, C58, C59, C60
49
100n
C3, C4, C5, C6, C7, C8, C9, C10 +41
3
10u
C22, C39, C45
3
2.2u
C52, C53, C54
1
22u
C56
2
10p
C61, C62
1
510
R1
3
10k
R2, R19, R20
3
4.7K
R3, R4, R6
1
27k
R5
2
330
R7, R15
2
2k
R8, R9
6
680
R10, R11, R12, R13, R14, R16
1
400
R17
1
4.06k
R18
1
100
R21
1
1M
R22

Graphics card rev-2 design files

The KiCad project lives in the ShaneTWilliams/worlds-worst-graphics-card repository on GitHub; these links point at the commit this page was built from.

Graphics card rev-2: common questions

What microcontroller does the Graphics card rev-2 use?

The Graphics card rev-2 is built around the STM32H745IITx, from the STM32 family.

How big is the Graphics card rev-2 PCB?

The Graphics card rev-2 measures 72.9 × 61.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Graphics card rev-2?

113 components, from 39 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Graphics card rev-2 design files?

From the ShaneTWilliams/worlds-worst-graphics-card repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Graphics card rev-2 design in my own project?

Yes, under the terms of its MIT license, which ShaneTWilliams chose for the repository.

Can I test firmware for the Graphics card rev-2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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