| 摘要 |
In a JTAG procedure, the electrical coupling normally dedicated to the TMS information is eliminated. Instead, the TDI line signals are reformatted into control packets and data packets. The control packets include one field that provides the TMS information. The control packets result in either the SHIFT DR state or the SHIFT IR state. The remaining field(s) in a control packet indicates the number of data signals to be transmitted in the data packet that is transferred in the shift state. The control packet/data packet format can support directly addressing or indirect addressing mode. |
