Patent ID: 8438439
Filing Date: 2013-05-07
Classification: G01R

Abstract:
1. An integrated circuit (IC) having a scan chain, further comprising a first interface group, a second interface group and a scan data selector; the first interface group and the second interface group each comprise at least two input/output (I/O) interfaces which can be packaged as external pins of the IC; the I/O interfaces of the first interface group are connected to input terminals of the scan data selector in one-to-one correspondence, and an output terminal of the scan data selector is connected to a scan data input terminal of the scan chair; a scan data output terminal of the scan chain is directly connected to the I/O interfaces of the second interface group; and the scan data selector is configured to, according to a package type indicating signal inputted to a control terminal thereof, select data in one of the I/O interfaces of the first interface group that corresponds to the package type indicating signal for output to the scan data input terminal, wherein in each package type of the IC, at least one of the I/O interfaces of the first interface group is packaged as an external pin, and at least one of the I/O interfaces of the second interface group is packaged as an external pin.