[[Schematics rev a]](Hardware/Hellen/hellen128mercedes-a-schematic.pdf)

[Hellen128 Interactive Pinout](https://rusefi.com/docs/pinouts/hellen/hellen128/)

[Google Docs Pinout Spreadsheet](https://docs.google.com/spreadsheets/d/1I-lZKRajTiEGFUXdZpXEtKF2pymlOo-lPahy3cLMnl4)

Mercedes M111 and M113 

Relevant? 

https://docs.google.com/spreadsheets/d/1JgGFJ8AggBFiKT_CQ1D6uYhaIsqeiH9RerxuVy1kp4Y/

## Extension Pads (rev. a)

| Pin | Type | Comments |
|---|---|---|
||**Outputs**||
| P33 | Bridge driver B | 3 A peak |
| P34 | Low side | 0.5 A |
| P35 | Low side | 0.5 A |
|   | **Inputs** |   |
| P30 | Analog pull up | |
| P31 | Analog pull down | |
| P32 | Analog pull down | |
|   | **MCU** |   |
| J1 | SPI, UART/GPIO | See schematic for details | 
|   | **WBO1** |   |
| J9 | XH-8 WBO1 connector| |
| P19 | GND | |
| P21 | H- | |
| P22 | R Trim | |
| P23 | Ip | |
| P24 | Vs/Ip | |
| P25 | Vs | |
| J7 | SWD| |
|   | **WBO2** |   |
| J18 | XH-8 WBO2 connector| |
| P18 | GND | |
| P20 | H- | |
| P26 | R Trim | |
| P27 | Ip | |
| P28 | Vs/Ip | |
| P29 | Vs | |
| J19 | SWD | |