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T2-hardware

tessel·t2-hardware

T2-hardware PCB layout, top view — open source Microchip SAM board by tessel
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About the T2-hardware PCB

T2-hardware is an open source Microchip SAM PCB design by tessel, published on GitHub under the SHL-2.1 license. It is a 4-layer board measuring 58.4 × 68.6 mm, with 300 components from 77 distinct parts.

Its main chip is the SAMD21G17A-MU, from the Microchip SAM family. Other key parts include the MT7620N, MT9700, AP3418, W9751G6KB-25 and S25FL256SAGNFI001. By type, the board carries 136 capacitors, 85 resistors, 24 diodes, 15 connectors, 13 inductors and 11 ICs.

From the project

Tessel 2 KiCad design files

To download TM's KiCAD library, containing all the schematic symbols and footprints, run this command:

We use the daily builds of KiCAD (for Ubuntu and OS X) and you should too! As a general rule, do not assume that schematic, layout, and manufacturing exports were kept abreast on each commit. Do a fresh export (or use tagged releases) if you intend to actually send off gerbers.

Main components on the T2-hardware

MT7620NMT9700AP3418SAMD21G17A-MUW9751G6KB-25S25FL256SAGNFI001AIC1528-0PSTRFE1.1

T2-hardware bill of materials (BOM)

300 components, 77 distinct parts.

QtyPartRefs
1
MT7620N
U201
3
MT9700
U301, U302, U304
2
AP3418
U303, U305
1
SAMD21G17A-MU
U401
1
W9751G6KB-25
U501
1
S25FL256SAGNFI001
U801
1
AIC1528-0PSTR
U901
1
FE1.1
U902
1
MMSS8550
Q301
1
DMG2305UX
Q302
1
20MHz
X201
1
FC-135
X401
1
12MHz
X901
2
CONN_02X05 DNP
J201, J401
1
CONN_01X03 DNP
J301
1
MICROUSB-TH
J402
2
MODULE_HEADER
J403, J404
3
CONN_01X01
J601, J602, J701
2
UFL DNP
J603, J604
1
HR911105A
J702
Show 57 more
QtyPartRefs
1
CONN_01X08 DNP
J703
1
CONN_01X04 DNP
J704
1
USB_A_2_stack
J901
2
ANTENNA
AE601, AE602
1
SW_PUSH
SW401
2
2450BL15B100
T601, T602
6
TP
TP301, TP302, TP401, TP402, TP403, TP404
3
GREEN
D301, D302, D704
9
CV0402VT6030T
D401, D403, D404, D901, D902, D903, D904, D905 +1
2
BLUE
D402, D703
1
AMBER
D701
1
RED
D702
8
CV0402VT6001T
D705, D706, D707, D708, D709, D710, D711, D712
2
3.9nH
L201, L202
2
2.2uH
L301, L303
1
10uH
L401
4
3nH
L601, L602, L603, L604
2
2.4nH
L605, L606
2
BLM21PG221SN1D
L901, L902
11
1uF
C201, C208, C209, C220, C230, C238, C325, C329 +3
5
10pF
C202, C203, C204, C402, C404
53
100nF
C205, C206, C211, C216, C218, C219, C221, C222 +45
6
4.7uF
C207, C210, C227, C303, C314, C319
4
18pF
C212, C214, C907, C909
6
10nF
C213, C302, C313, C317, C501, C506
7
10uF DNP
C215, C217, C224, C226, C308, C324, C327
22
10uF
C231, C301, C304, C305, C306, C309, C310, C311 +14
8
100pF
C401, C601, C606, C607, C608, C609, C703, C903
2
5pF
C513, C514
4
2.2pF
C602, C603, C604, C605
2
0.8pF
C610, C611
4
1.8pF
C612, C613, C616, C617
2
100pF DNP
C614, C615
11
4.7kR
R201, R203, R417, R418, R419, R420, R601, R603 +3
14
22R
R202, R404, R405, R407, R408, R409, R410, R411 +6
2
100kR DNP
R301, R302
2
27kR
R303, R304
4
120R
R305, R306, R505, R722
1
450kR 1%
R307
2
100kR 1%
R308, R313
8
10kR
R309, R310, R311, R406, R416, R421, R904, R908
1
200kR 1%
R312
9
100kR
R314, R315, R401, R604, R712, R718, R721, R901 +1
5
330R
R402, R403, R713, R714, R715
3
1kR
R415, R717, R719
2
4.7kR 1%
R501, R502
1
4.7kR DNP
R602
1
24kR 1%
R605
4
10kR DNP
R701, R702, R703, R704
4
49.9R 1%
R705, R706, R707, R708
2
100kR DNP
R709, R710
1
6.19kR 1%
R711
2
0R DNP
R902, R905
1
8.2kR 1%
R906
1
2.7kR 1%
R907
2
0R DNP
R909, R910
2
450kR
R911, R912

T2-hardware design files

The KiCad project lives in the tessel/t2-hardware repository on GitHub; these links point at the commit this page was built from.

T2-hardware: common questions

What microcontroller does the T2-hardware use?

The T2-hardware is built around the SAMD21G17A-MU, from the Microchip SAM family.

How big is the T2-hardware PCB?

The T2-hardware measures 58.4 × 68.6 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the T2-hardware?

300 components, from 77 distinct parts. The full bill of materials is listed on this page.

Where can I download the T2-hardware design files?

From the tessel/t2-hardware repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the T2-hardware design in my own project?

It is published under SHL-2.1, which limits how it may be reused; read the license before building on it.

Can I test firmware for the T2-hardware without the hardware?

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

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