ATAPIHat-SMI
Manawyrm·ATAPIHat-SMI
About the ATAPIHat-SMI PCB
ATAPIHat-SMI is an open source PCB design by Manawyrm, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 65 × 56 mm, with 40 components from 12 distinct parts.
By type, the board carries 33 resistors, 2 connectors, 2 capacitors and 1 diode.
From the project
High-speed ATAPIHat for BCM2835 Secondary Memory Interface
ATAPIHat-SMI =============================
This is an experimental adapter PCB for the pata-gpio driver. The pinout was chosen deliberately to support faster SMI and BCM2835 register modes, which are not yet supported in the kernel driver.
Rev.A testboards were ordered but not tested yet. Proceed at your own risk.
Schematic Interactive BOM Bitbanged-GPIO Kernel driver

ATAPIHat-SMI bill of materials (BOM)
40 components, 12 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Pi | PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | IDE | IDC-Header_2x20_P2.54mm_Vertical | J2 |
| 2 | ToolingHole | ToolingHole_JLCSMT | H1, H2 |
| 1 | LED | LED_0603_1608Metric | D1 |
| 1 | 100NF 100nF | C_0402_1005Metric | C1 |
| 1 | 22UF 22uF | C_0805_2012Metric | C2 |
| 22 | 33R | R_0402_1005Metric | R1, R2, R4, R5, R6, R9, R10, R11 +14 |
| 2 | 4.7K 4.7k | R_0402_1005Metric | R3, R17 |
| 3 | 75R | R_0402_1005Metric | R7, R8, R20 |
| 3 | 22R | R_0402_1005Metric | R14, R23, R30 |
| 2 | 10K 10k | R_0402_1005Metric | R16, R18 |
| 1 | 5.6K 5.6k | R_0402_1005Metric | R19 |
ATAPIHat-SMI design files
The KiCad project lives in the Manawyrm/ATAPIHat-SMI repository on GitHub; these links point at the commit this page was built from.
ATAPIHat-SMI: common questions
How big is the ATAPIHat-SMI PCB?
The ATAPIHat-SMI measures 65 × 56 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the ATAPIHat-SMI?
40 components, from 12 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 ATAPIHat-SMI design files?
From the Manawyrm/ATAPIHat-SMI repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the ATAPIHat-SMI design in my own project?
Yes, under the terms of its GPL-3.0 license, which Manawyrm chose for the repository.