Linux SoM
All the signals available on the Netus G20 connectors are linked directly to the CPU except BATT IN (J1.17 - J3.18). Refer to the AT91SAM9G20 datasheet to know the CPU signals function
J1 (top side) and J3 (bottom side) connectors share the same signals.
| Top | Bottom | CPU Signal | Function | Type | Comments |
|---|---|---|---|---|---|
| J1.1 | J3.1 | 3V3 | Power | ||
| J1.2 | J3.2 | 3V3 | Power | ||
| J1.3 | J3.3 | JTAG TDO | Test data out | Output | |
| J1.4 | J3.4 | HDMA | |||
| J1.5 | J3.5 | JTAG TDI | Test data in | Input | |
| J1.6 | J3.6 | HDPA | |||
| J1.7 | J3.7 | JTAG NTRST | Test reset signal | Input | |
| J1.8 | J3.8 | GND | Ground | Ground | |
| J1.9 | J3.9 | JTAG RTCK | Return test clock | Output | |
| J1.10 | J3.10 | HDPB | |||
| J1.11 | J3.11 | JTAG SEL | JTAG Selection | Input | |
| J1.12 | J3.12 | HDMB | |||
| J1.13 | J3.13 | JTAG TCK | Test clock | Input | |
| J1.14 | J3.14 | GND | Ground | Ground | |
| J1.15 | J3.15 | JTAG TMS | Test mode select | Input | |
| J1.16 | J3.16 | DDP | |||
| J1.17 | J3.17 | BATT IN | Battery backup 3V input | ||
| J1.18 | J3.18 | DDM | |||
| J1.19 | J3.19 | 1V0 | Power | ||
| Top | Bottom | CPU Signal | Function | Type | Comments |
| J1.20 | J3.20 | 1V0 | Power | ||
| J1.21 | J3.21 | SHDN# | Shutdown control | Output | |
| J1.22 | J3.22 | WAKE UP | Wake-up input | Input | |
| J1.23 | J3.23 | NRST | |||
| J1.24 | J3.24 | GND | Ground | Ground | |
| J1.25 | J3.25 | PB19 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.26 | J3.26 | PB18 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.27 | J3.27 | PB17 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.28 | J3.28 | PB16 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.29 | J3.29 | PB15 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.30 | J3.30 | PB14 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.31 | J3.31 | PB9 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.32 | J3.32 | PB8 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.33 | J3.33 | PB7 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.34 | J3.34 | PB6 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.35 | J3.35 | PB5 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.36 | J3.36 | PB4 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.37 | J3.37 | PB3 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.38 | J3.38 | PB2 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.39 | J3.39 | PB1 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| Top | Bottom | CPU Signal | Function | Type | Comments |
| J1.40 | J3.40 | PB0 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J1.41 | J3.41 | 1V8 | Power | ||
| J1.42 | J3.42 | 1V8 | Power | ||
| J1.43 | J3.43 | PC15 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.44 | J3.44 | PC14 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.45 | J3.45 | PC13 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.46 | J3.46 | PC12 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.47 | J3.47 | PC11 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.48 | J3.48 | PC10 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.49 | J3.49 | PC9 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.50 | J3.50 | PC8 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.51 | J3.51 | PC7 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.52 | J3.52 | PC6 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.53 | J3.53 | PC5 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.54 | J3.54 | PC4 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J1.55 | J3.55 | FREE1 | Available | ||
| J1.56 | J3.56 | FREE2 | Available | ||
| J1.57 | J3.57 | FREE3 | Available | ||
| J1.58 | J3.58 | FREE4 | Available | ||
| J1.59 | J3.59 | GND | Ground | Ground | |
| J1.60 | J3.60 | GND | Ground | Ground |
J2 (top side) and J4 (bottom side) connectors share the same signals.
| Top | Bottom | Signal name | Function | Type | Comments |
|---|---|---|---|---|---|
| J2.1 | J4.1 | 3V3 | |||
| J2.2 | J4.2 | 3V3 | |||
| J2.3 | J4.3 | PA31 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.4 | J4.4 | PA30 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.5 | J4.5 | PA29 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.6 | J4.6 | PA28 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.7 | J4.7 | PA27 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.8 | J4.8 | PA26 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.9 | J4.9 | PA25 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.10 | J4.10 | PA24 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.11 | J4.11 | PA23 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.12 | J4.12 | PA22 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.13 | J4.13 | PA21 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.14 | J4.14 | PA20 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.15 | J4.15 | PA19 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.16 | J4.16 | PA18 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.17 | J4.17 | PA17 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.18 | J4.18 | PA16 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.19 | J4.19 | PA15 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| Top | Bottom | Signal name | Function | Type | Comments |
| J2.20 | J4.20 | PA14 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.21 | J4.21 | PA13 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.22 | J4.22 | PA12 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.23 | J4.23 | PA11 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.24 | J4.24 | PA10 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.25 | J4.25 | PA9 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.26 | J4.26 | PA8 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.27 | J4.27 | PA7 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.28 | J4.28 | PA6 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.29 | J4.29 | PA5 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.30 | J4.30 | PA4 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.31 | J4.31 | PA3 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.32 | J4.32 | PA2 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.33 | J4.33 | PA1 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.34 | J4.34 | PA0 | Parallel IO Controller A | I/O | Pulled-up input at reset |
| J2.35 | J4.35 | PB31 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.36 | J4.36 | PB30 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.37 | J4.37 | PB29 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.38 | J4.38 | PB28 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.39 | J4.39 | PB27 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| Top | Bottom | Signal name | Function | Type | Comments |
| J2.40 | J4.40 | PB26 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.41 | J4.41 | PB25 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.42 | J4.42 | PB24 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.43 | J4.43 | PB23 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.44 | J4.44 | PB22 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.45 | J4.45 | PB21 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.46 | J4.46 | PB20 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.47 | J4.47 | PB13 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.48 | J4.48 | PB12 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.49 | J4.49 | PB11 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.50 | J4.50 | PB10 | Parallel IO Controller B | I/O | Pulled-up input at reset |
| J2.51 | J4.51 | PC3 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J2.52 | J4.52 | PC2 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J2.53 | J4.53 | PC1 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J2.54 | J4.54 | PC0 | Parallel IO Controller C | I/O | Pulled-up input at reset |
| J2.55 | J4.55 | AGND | |||
| J2.56 | J4.56 | AGND | |||
| J2.57 | J4.57 | AVDD | |||
| J2.58 | J4.58 | VREF | |||
| J2.59 | J4.59 | GND | |||
| J2.60 | J4.60 | GND |
 | Netus G20 is a 4x4cm Linux ready core engine based on the new ARM9 (c) CPU Atmel (tm) AT91SAM9G20 @ 400Mhz designed to reduce the time to market your Linux embedded projects.
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