Data transmission method and system, and chip

The invention provides a data transmission method and system, and a chip. The data transmission method comprises the following steps: receiving an on-chip bus write access request; wherein the on-chip bus write access request comprises valid data; obtaining configuration information of a packaging head; packaging the effective data into a first Ethernet packet according to the configuration information of the packaging head, and sending the first Ethernet packet; wherein the first Ethernet packet comprises a packaging head and valid data. 本申请提供了一种数据传输方法和系统、芯片，数据传输方法包括：接收片内总线写访问请求；其中，片内总线写访问请求包括：有效数据；获取封装头的配置信息；根据封装头的配置信息将有效数据封装成第一以太网包，发送第一以太网包；其中，第一以太网包包括：封装头和有效数据。