Semiconductor integrated circuit device having operation test function
View Patent ↗When an operation test is performed to a plurality of circuit blocks each having the same circuit configuration, common test pattern data is transmitted to the respective circuit blocks through corresponding selector circuits.
1. A semiconductor integrated circuit device comprising:
a plurality of circuit blocks each including a scan cell and having the same function;
a plurality of data input terminals provided to correspond to said plurality of circuit blocks;
a common input terminal receiving common test pattern data used for an operation test of said plurality of circuit blocks;
a plurality of select circuits, provided to correspond to said plurality of circuit blocks, each for transmitting either test pattern data input into corresponding one of said plurality of data input terminals or said common test pattern data input into said common input terminal, to each of said plurality of circuit blocks during said operation test in response to a control signal; and
a plurality of first test output terminals, provided to correspond to said plurality of circuit blocks, respectively, each for outputting output data output from corresponding one of said circuit blocks in response to said test pattern data or said common test pattern data during said operation test.
2. The semiconductor integrated circuit device according to claim 1 , further comprising:
a logic operation section outputting a predetermined logic operation result by inputting said output data from said plurality of circuit blocks, respectively; and
a second test output terminal for outputting the result of said logic operation of said logic operation section.
3. The semiconductor integrated circuit device according to claim 2 , wherein
said logic operation section includes:
a first logic gate outputting a result of an AND operation performed with respect to said output data from said plurality of circuit blocks; and
a second logic gate outputting a result of an OR operation performed with respect to said output data from said plurality of circuit blocks.
4. The semiconductor integrated circuit device according to claim 2 , wherein
said logic operation section includes:
a first logic gate outputting a result of an identity operation performed with respect to said output data from said plurality of circuit blocks, respectively; and
a second logic gate outputting a result of an OR operation or a result of an AND operation performed with respect to said output data from said plurality of circuit blocks, respectively.
5. The semiconductor integrated circuit device according to claim 1 , wherein
each of said plurality of circuit blocks has the same circuit configuration.