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S29PL-J55BAI011 Datasheet(PDF) 23 Page - SPANSION |
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S29PL-J55BAI011 Datasheet(HTML) 23 Page - SPANSION |
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23 / 96 page ![]() September 22, 2006 S29PL-J_00_A9 S29PL-J 21 Da ta Sh e e t (Adv a n ce In f o r m ation) 10.1.1 Random Read (Non-Page Read) Address access time (tACC) is equal to the delay from stable addresses to valid output data. The chip enable access time (tCE) is the delay from the stable addresses and stable CE# to valid data at the output inputs. The output enable access time is the delay from the falling edge of the OE# to valid data at the output inputs (assuming the addresses have been stable for at least tACC–tOE time). 10.1.2 Page Mode Read The device is capable of fast page mode read and is compatible with the page mode Mask ROM read operation. This mode provides faster read access speed for random locations within a page. Address bits Amax–A3 select an 8 word page, and address bits A2–A0 select a specific word within that page. This is an asynchronous operation with the microprocessor supplying the specific word location. The random or initial page access is tACC or tCE and subsequent page read accesses (as long as the locations specified by the microprocessor falls within that page) is equivalent to tPACC. When CE# (CE1# and CE#2 in PL129J) is deasserted (=VIH), the reassertion of CE# (CE1# or CE#2 in PL129J) for subsequent access has access time of tACC or tCE. Here again, CE# (CE1# /CE#2 in PL129J)selects the device and OE# is the output control and should be used to gate data to the output inputs if the device is selected. Fast page mode accesses are obtained by keeping Amax–A3 constant and changing A2–A0 to select the specific word within that page. 10.2 Simultaneous Read/Write Operation In addition to the conventional features (read, program, erase-suspend read, erase-suspend program, and program-suspend read), the device is capable of reading data from one bank of memory while a program or erase operation is in progress in another bank of memory (simultaneous operation). The bank can be selected by bank addresses (PL127J: A22–A20, PL129J and PL064J: A21–A19, PL032J: A20–A18) with zero latency. The simultaneous operation can execute multi-function mode in the same bank. Table 10.3 Page Select Word A2 A1 A0 Word 0 0 0 0 Word 1 0 0 1 Word 2 0 1 0 Word 3 0 1 1 Word 4 1 0 0 Word 5 1 0 1 Word 6 1 1 0 Word 7 1 1 1 Table 10.4 Bank Select Bank PL127J: A22–A20, PL064J: A21–A19, PL032J: A20–A18 Bank A 000 Bank B 001, 010, 011 Bank C 100, 101, 110 Bank D 111 Bank CE1# CE2# PL129J: A21–A20 Bank 1A 0 1 00 Bank 1B 0 1 01, 10, 11 Bank 2A 1 0 00, 01, 10 Bank 2B 1 0 11 |
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