Semiconductor integrated circuit device having data input/output configuration variable
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorAkira Yamazaki
Life of this patent
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Abstract
In an embedded DRAM core of which word configuration can be varied, a modifying circuit selects either word configuration designating information from a metal word configuration setting circuit setting the word configuration with metal slice or word configuration designating information stored in a register, and supplies the selected information to an I/O switch. The I/O switch sets an internal switch gate to a conductive or non-conductive state in accordance with the received word configuration information, and electrically sets a connection path of a preamplifier/write driver and a DQ buffer. A test can be performed while operating an embedded DRAM macro under an actual use condition.
Claims10
A semiconductor integrated circuit device, comprising:
- a plurality of internal data lines;
- a plurality of internal write/read circuits, arranged corresponding to said plurality of internal data lines, each activated in response to a select signal, and communicating data with a corresponding internal data line when activated;
- a plurality of data input/output circuits arranged, corresponding to said plurality of internal write/read circuits, each selectively set operable in accordance with data bit number designating information and activated in response to a data access instruction signal when set operable, and communicating data with a corresponding internal write/read circuit when activated, said data bit number designating information being externally variable;
- a connection circuit including a switching circuit for electrically setting a connection path between said plurality of internal write/read circuits and said plurality of data input/output circuits in accordance with said data bit number designating information, for connecting said plurality of internal write/read circuits with said plurality of data input/output circuits;
- and
- a path setting circuit for setting the connection path of said switching circuit in accordance with said data bit number designating information, said connection path being variable in accordance with said data bit number designating information.
Dependencies are inferred from the claim text.