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S29GL01GT Datasheet, PDF (18/105 Pages) Cypress Semiconductor – 1 Gbit (128 Mbyte), 512 Mbit (64 Mbyte) | |||
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S29GL01GT, S29GL512T
4. Read Operations
4.1 Asynchronous Read
Each read access may be made to any location in the memory (random access). Each random access is self-timed with the same
latency from CE# or address to valid data (tACC or tCE).
4.2 Page Mode Read
Each random read accesses an entire 32-byte Page in parallel. Subsequent reads within the same Page have faster read access
speed. The Page is selected by the higher address bits (Amax-A4), while the specific word of that Page is selected by the least
significant address bits A3-A0 (A3-A-1 in x8 mode). The higher address bits are kept constant and only A3-A0 (A3-A-1 in x8 mode)
changed to select a different word in the same Page. This is an asynchronous access with data appearing on DQ15-DQ0 (DQ7-DQ0
in x8 mode) when CE# remains Low, OE# remains Low, and the asynchronous Page access time (tPACC) is satisfied. If CE# goes
High and returns Low for a subsequent access, a random read access is performed and time is required (tACC or tCE).
Document Number: 002-00247 Rev. *G
Page 18 of 105
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