Title:
SEMICONDUCTOR DEVICE AND CONTROL METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/000809
Kind Code:
A1
Abstract:
A semiconductor device comprises a first current-voltage conversion circuit (16)
connected to a core cell (12) provided in a nonvolatile memory cell array (10),
a second current-voltage conversion circuit (26) connected through a reference
data line (24) to a reference cell (22), a sense amplifier (18) for sensing the
outputs of the first and second current-voltage conversion circuits, a comparison circuit
(28) for comparing the voltage value at the reference cell data line with a predetermined
voltage value, and a charging circuit (30) for charging the reference cell data
line during the precharge period thereof if the voltage value at the reference
cell data line is lower than the predetermined voltage value. A control method
of the semiconductor device is also disclosed. The semiconductor device and
its control method can reduce the precharge time of the reference cell data line
and therefore the data read time.
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Inventors:
OGAWA AKIRA (JP)
YANO MASARU (JP)
YANO MASARU (JP)
Application Number:
PCT/JP2005/011815
Publication Date:
January 04, 2007
Filing Date:
June 28, 2005
Export Citation:
Assignee:
SPANSION LLC (US)
SPANSION JAPAN LTD (JP)
OGAWA AKIRA (JP)
YANO MASARU (JP)
SPANSION JAPAN LTD (JP)
OGAWA AKIRA (JP)
YANO MASARU (JP)
International Classes:
G11C16/28
Domestic Patent References:
| WO2003088261A1 | 2003-10-23 |
Foreign References:
| JP2001250391A | 2001-09-14 | |||
| JP2000021188A | 2000-01-21 | |||
| JP2002237193A | 2002-08-23 | |||
| JP2002025286A | 2002-01-25 | |||
| JP2004063059A | 2004-02-26 | |||
| JPS6258495A | 1987-03-14 | |||
| JPH03242898A | 1991-10-29 |
Attorney, Agent or Firm:
KATAYAMA, Shuhei (Kyobashi 1-chom, Chuo-ku Tokyo 31, JP)
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