Basic concept of NNToolChain
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**SOPHONSDK**

Sophgo's original development tool kit for in-depth learning.

**BM168x**

Tensor Processing Unit released by Sophgo for in-depth learning field supports chips of BM1684 and BM1684X at present.

**PCIE-Mode**

A kind of product form. SDK is running on X86 platform. BM168x exists as the computing accelerator card of in-depth learning of PCIE.

**SOC-Mode**

A kind of product form. SDK runs independently on BM168x platform and supports interconnection with other equipment via Gigabit Ethernet.

**TPU compiler**

Refers to an optimizing compiler of deep neural network (DNN) developed against Sophon's TPU processor. It can convert various DNNs defined by in-depth learning frame into instruction streams running on TPU.

**BMNetC**:    Caffe model-oriented BMCompiler frontend

**BMNetT**:    TensorFlow model-oriented BMCompiler frontend

**BMNetM**:    MxNet model-oriented BMCompiler frontend

**BMNetP**:    PyTorch model-oriented BMCompiler frontend

**BMNetD**:    Darknet model-oriented BMCompiler frontend

**BMNetO**:    ONNX model-oriented BMCompiler frontend

**BMPaddle**:  PaddlePaddle model -oriented BMCompiler frontend