Bscan Bonding Chain

Bonding Chain

用于指定不同的bscan chain组合配置(bonding configuration);例如存在单独测某一组PAD的需求;或者存在bypass phy的BSCAN cell的需求;

在两个DFTspec wrapper(EmbeddedBoundaryScan/BoundaryScan)中都存在BondingConfigurations; 其中EmbeddedBoundaryScan 用于在未放置Pad时提前做Boundaryscan; 或者when you want to insert the boundary-scan cells into non-unique sub-modules without having to uniquify them;时使用;

read_config_data -in_wrapper /DftSpecification($GEV(block),gate_dft_instr)/BoundaryScan -from_string {BondingConfigurations {BondingConfiguration(usb_bypass) {enable_signal           : i_ctcm_top/dummy_mode1_o;bypassed_logical_groups : LG3;}}
}

bounding config会在LG 之间创建一个mux; 将bypass的bscan group bypass掉;

bounding config的灵活度很高可以设置单独的mode bypass单独的几个PAD; 详情见tessent的reference manual