HardLabs

Portpulse

gslee-dev·portpulse·hardware/RevC1/kicad/USB_Replug_Dongle_RevC1.kicad_pcb

Portpulse PCB layout, top view — open source WCH CH32/CH55x board by gslee-dev

About the Portpulse PCB

Portpulse is an open source WCH CH32/CH55x PCB design by gslee-dev, published on GitHub under the MIT license. It is a 4-layer board measuring 49.5 × 21.6 mm, with 29 components from 14 distinct parts.

Its main chip is the CH552T, from the WCH CH32/CH55x family. Other key parts include the CH334U, FSUSB42MUX, TPS2552DBVR, XC6206P332MR-G and USBLC6-2SC6. By type, the board carries 10 capacitors, 9 resistors, 7 ICs, 2 connectors and 1 crystal.

From the project

USB replug test dongle with KiCad hardware, CH552 firmware, and native C host

USB 장치를 소프트웨어 명령으로 실제 분리·재연결하는 효과를 만들기 위한 USB 2.0 test dongle입니다. PC와 제어 MCU의 연결은 유지하고, DUT 쪽 VBUS와 D+/D−만 순서대로 차단·복구합니다.

off는 data pair를 먼저 끊고 VBUS를 차단합니다. on은 data pair를 연결한 뒤 VBUS를 켜고 fault를 다시 확인합니다. 부팅·reset·fault 상태에서는 DUT가 꺼지도록 firmware state machine을 구성했습니다.

자세한 명령과 수치는 offline verification에 있습니다. 두 connector footprint의 치수 출처와 미검증 범위는 footprint sources에 기록했습니다.

Portpulse, from the project README
From the project README

Main components on the Portpulse

CH334UCH552TFSUSB42MUXTPS2552DBVRXC6206P332MR-GUSBLC6-2SC6

Portpulse bill of materials (BOM)

29 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CH334U
WCH
U1
1
CH552T
WCH
U2
1
FSUSB42MUX
onsemi
U3
1
TPS2552DBVR
Texas Instruments
U4
1
XC6206P332MR-G
Torex
U5
2
USBLC6-2SC6
STMicroelectronics
U6, U7
1
X322512MSB4SI
12 MHz
YXC
Y1
1
TYPE-C-3.1-16PIN
SHOU HAN
J1
1
904-131A2032S10100
Jing Extension of the Electronic Co.
J2
2
10uF 10V X5R
Generic
C1, C10
2
1uF 16V X5R
Generic
C2, C3
6
100nF 16V X7R
Generic
C4, C5, C6, C7, C8, C9
8
5.1k 1%
Generic
R1, R2, R4, R5, R6, R7, R8, R9
1
51k 1%
Generic
R10

Portpulse design files

The KiCad project lives in the gslee-dev/portpulse repository on GitHub; these links point at the commit this page was built from.

Portpulse: common questions

What microcontroller does the Portpulse use?

The Portpulse is built around the CH552T, from the WCH CH32/CH55x family.

How big is the Portpulse PCB?

The Portpulse measures 49.5 × 21.6 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Portpulse?

29 components, from 14 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 Portpulse design files?

From the gslee-dev/portpulse repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Portpulse design in my own project?

Yes, under the terms of its MIT license, which gslee-dev chose for the repository.

Can I test firmware for the Portpulse without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug WCH CH32/CH55x firmware against it before you order a PCB.

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