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README.md 1.32 KiB
D51 Module, Round Two
For mixed volume production of various network endpoints / routers, this board is the collected set of boilerplate utilities need to boot and use the ATSAMD51:
- JTAG Programming Header (SWD Pins)
- Reset Switch
- 5v in -> local 3v3 reg
- Bypass Caps
- 32kHz Xtal
- 16MHz Xtal
- LEDS: Power, Clock, Error
- USB Connector
- RS485 PHY w/ DE, RE, and Logic-Selectable Termination Resistor
- DIP Switch for local configuration, i.e. bus-drop-address
- SAMD51
Most of the other D51 pins are broken out on 0.05" spaced castellated pins. The module is about as tiny as I could flex it, 20.3 x 28.6mm. The notion is to make lots of these, and solder them on to more ad-hoc driver boards.
Part Numbers
| Part | Identifier | Digikey PN |
|---|---|---|
| RS485 Driver | --- | MAX13450EAUD+-ND |
| Screw Terminal | --- | 277-1860-ND |
| DIP Switch | --- | CT3111-ND |
| XTAL 32KHz | --- | XC1617CT-ND |
| XTAL 16MHz | --- | SER4046CT-ND |
| 0402 LED Red | D2 | 516-3060-1-ND |
| 0402 LED Green | D3, D4 | 516-3066-1-ND |
| JTAG Program Header | --- | 1175-1629-ND |
| Reset Switch | --- | CKN10685CT-ND |
| D51 | --- | ATSAMD51J19A-MUTCT-ND |
| 3v3 600mA VREG | --- | AP2112K-3.3TRG1DIDKR-ND |
| USB Micro Plug | --- | 609-4613-1-ND |