Semiconductor chip and semiconductor device including the same
View Patent ↗A semiconductor chip includes a plurality of pads; input/output circuits connected with the plurality of pads, respectively; a product data storage section configured to store a product data; and a setting section configured to set to an active state, each of the input circuits which is connected to one of the plurality of pads used for input to an internal circuit, and each of the output circuits which is connected to one of the plurality of pads used for output from the internal circuit, and set remaining input/output circuits to an inactive state, based on the product data.
1. A semiconductor chip comprising:
a plurality of pads;
input/output circuits connected with said plurality of pads, respectively;
a product data storage section configured to store a product data; and
a setting section configured to set to an active state, each of said input circuits which is connected to one of said plurality of pads used for input to an internal circuit, and each of said output circuits which is connected to one of said plurality of pads used for output from the internal circuit, and set remaining input/output circuits to an inactive state, based on said product data.
2. The semiconductor chip according to claim 1 , wherein said product data is invisible to a user.
3. The semiconductor chip according to claim 1 , wherein said product data contains a data indicating a number of external pins of a package on which said semiconductor chip is installed.
4. The semiconductor chip according to claim 3 , wherein said product data storage section comprises a nonvolatile memory, in which said product data is written in a test of said semiconductor chip.
5. The semiconductor chip according to claim 1 , wherein said product data storage section stores said product data prior to shipment.
6. The semiconductor chip according to claim 1 , wherein said setting section comprises:
a plurality of control lines provided for a number of kinds of packages on which said semiconductor chip is to be installed, and
said setting section outputs a control signal on one of said plurality of control lines based on said product data, such that said input/output circuits corresponding to a specific package on which said semiconductor chip is actually installed are activated.
7. The semiconductor chip according to claim 6 , wherein each of said input circuits comprises:
an input buffer circuit connected to at least one of said plurality of control lines, and
said input buffer circuit is set to the active state when said control signal is received from the connected line, and to the inactive state when said control signal is not received.
8. The semiconductor chip according to claim 7 , wherein said each input circuit further comprises a termination circuit, and
said termination circuit outputs a signal with a predetermined level to the internal circuit when said input circuit is set to the inactive state.
9. The semiconductor chip according to claim 1 , wherein said input/output circuits set to the active state are substantially uniformly arranged around a periphery of said semiconductor chip in each package.
10. A semiconductor device comprising:
a plurality of leads;
a plurality of bonding wires connected to said plurality of leads, respectively; and
a semiconductor chip,
wherein said semiconductor chip comprises:
a plurality of pads, a part of which is connected to said plurality of bonding wires;
input/output circuits connected with said plurality of pads, respectively;
a product data storage section configured to store a product data; and
a setting section configured to set to an active state, each of said input circuits which is connected to one of the part of said plurality of pads used for input to an internal circuit, and each of said output circuits which is connected to one of the part of said plurality of pads used for output from the internal circuit, and set remaining input/output circuits connected to pads other than the part of said plurality of pads, to an inactive state, based on said product data.
11. The semiconductor device according to claim 10 , wherein said product data is invisible to a user.
12. The semiconductor chip according to claim 11 , wherein said product data contains a data indicating a number of external pins of a package on which said semiconductor chip is installed.
13. The semiconductor device according to claim 12 , wherein said product data storage section comprises a nonvolatile memory, in which said product data is written in a test of said semiconductor chip.
14. The semiconductor device according to claim 11 , wherein said setting section comprises:
a plurality of control lines provided for a number of kinds of packages on which said semiconductor chip is to be installed, and
said setting section outputs a control signal on one of said plurality of control lines based on said product data, such that said input/output circuits corresponding to a specific package on which said semiconductor chip is actually installed are activated.
15. The semiconductor device according to claim 14 , wherein each of said input circuits comprises:
an input buffer circuit connected to at least one of said plurality of control lines, and
said input buffer circuit is set to the active state when said control signal is received from the connected line, and to the inactive state when said control signal is not received.
16. The semiconductor device according to claim 15 , wherein said each input circuit further comprises a termination circuit, and
said termination circuit outputs a signal with a predetermined level to the internal circuit when said input circuit is set to the inactive state.
17. The semiconductor device according to claim 11 , wherein said input/output circuits set to the active state are substantially uniformly arranged around a periphery of said semiconductor chip in each package.