Claims
- 1. A one-chip memory device comprising:
- a dynamic RAM an operation of which is controlled by a row address strobe signal, a column address strobe signal and a write enable signal; and
- a control circuit which responds to at least a low level of said write enable signal at a time of a falling edge of said row address strobe signal,
- wherein said operation of said dynamic RAM is set to a specific mode by an output of said control circuit in response to said low level of said write enable signal at said time of said falling edge of said row address strobe signal.
- 2. A one-chip memory device according to claim 1,
- wherein a write operation to said dynamic RAM is carried out in accordance with said specific mode.
- 3. A one-chip memory device according to claim 1,
- wherein said operation of said dynamic RAM is set to said specific mode by an output of a register which stores mode designation signals supplied from external address terminals, and which is controlled by said output of said control circuit.
- 4. A one-chip memory device according to claim 2,
- wherein said operation of said dynamic RAM is set to said specific mode by an output of a register which stores mode designation signals supplied from external address terminals, and which is controlled by said output of said control circuit.
Priority Claims (5)
Number |
Date |
Country |
Kind |
59-208266 |
Oct 1984 |
JPX |
|
60-105844 |
May 1985 |
JPX |
|
60-105845 |
May 1985 |
JPX |
|
60-105847 |
May 1985 |
JPX |
|
60-105850 |
May 1985 |
JPX |
|
CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation of application Ser. No. 08/435,959, filed May 5, 1995; which is a continuation of application Ser. No. 08/294,407, filed Aug. 23, 1994 now U.S. Pat. No. 5,448,519; which is a continuation of application Ser. No. 07/855,843, filed Mar. 20, 1992 now U.S. Pat. No. 5,450,342; which is a continuation-in-part of application Ser. No. 07/349,403, filed May 8, 1989 now U.S. Pat. No. 5,175,838; which is a continuation of application Ser. No. 07/240,380, filed Aug. 29, 1988 now U.S. Pat. No. 4,868,781; which is a continuation of application Ser. No. 06/779,676, filed Sep. 24, 1985; said U.S. Pat. No. 4,868,781 being reissued by application Ser. No. 07/542,028, filed Jun. 21, 1990 now Re. 33,922; said application Ser. No. 07/855,843 now U.S. Pat. No. 5,450,342 also being a continuation-in-part of Ser. No. 07/816,583, filed Jan. 3, 1992; which is a continuation of application Ser. No. 07/314,238, filed Feb. 22, 1989 now U.S. Pat. No. 5,113,487; which is a continuation of application Ser. No. 06/864,502, filed May 19, 1986, now abandoned, said application Ser. No. 07/816,583 also being a continuation-in-part of application Ser. No. 07/349,403, filed May 8, 1989 now U.S. Pat. No. 5,175,838, which is a continuation of application Ser. No. 07/240,380, filed Aug. 29, 1988 now U.S. Pat. No. 4,868,781; which is a continuation of application Ser. No. 06/779,676, filed Sep. 24, 1985, now abandoned; said U.S. Pat. No. 4,868,781 being reissued by application Ser. No. 07/542,028, filed Jun. 21, 1990 now Re. 33,922.
US Referenced Citations (40)
Foreign Referenced Citations (4)
Number |
Date |
Country |
3437896 |
Apr 1985 |
DEX |
59-60658 |
Sep 1982 |
JPX |
58-115673 |
Jul 1983 |
JPX |
0200845 |
Dec 1983 |
JPX |
Continuations (7)
|
Number |
Date |
Country |
Parent |
435959 |
May 1995 |
|
Parent |
294407 |
Aug 1994 |
|
Parent |
855843 |
Mar 1992 |
|
Parent |
240380 |
Aug 1988 |
|
Parent |
779676 |
Sep 1985 |
|
Parent |
314238 |
Feb 1989 |
|
Parent |
864502 |
May 1986 |
|
Continuation in Parts (3)
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Number |
Date |
Country |
Parent |
349403 |
May 1989 |
|
Parent |
816583 |
Jan 1992 |
|
Parent |
349403 |
|
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