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JS28F512P30TFA 数据表(PDF) 39 Page - Micron Technology |
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JS28F512P30TFA 数据表(HTML) 39 Page - Micron Technology |
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39 / 86 page ![]() Datasheet Sept 2012 39 Order Number:208042-0 6 P30-65nm Table 15: End of Wordline Data and WAIT state Comparison 11.2.4 WAIT Polarity (RCR.10) The WAIT Polarity bit (WP), RCR.10 determines the asserted level (VOH or VOL) of WAIT. When WP is set, WAIT is asserted high. When WP is cleared, WAIT is asserted low (default). WAIT changes state on valid clock edges during active bus cycles (CE# asserted, OE# asserted, RST# deasserted). 11.2.5 WAIT Delay (RCR.8) The WAIT Delay (WD) bit controls the WAIT assertion-delay behavior during synchronous burst reads. WAIT can be asserted either during or one data cycle before valid data is output on DQ[15:0]. When WD is set, WAIT is deasserted one data cycle before valid data (default). When WD is cleared, WAIT is deasserted during valid data. 11.2.6 Burst Sequence (RCR.7) The Burst Sequence (BS) bit selects linear-burst sequence (default). Only linear-burst sequence is supported. Table 17 shows the synchronous burst sequence for all burst lengths, as well as the effect of the Burst Wrap (BW) setting. Latency Count P30-130nm P30-65nm Data States WAIT States Data States WAIT States 1 Not Supported Not Supported Not Supported Not Supported 2 4 0 to 1 Not Supported Not Supported 3 4 0 to 2 Not Supported Not Supported 4 4 0 to 3 Not Supported Not Supported 5 4 0 to 4 16 0 to 4 6 4 0 to 5 16 0 to 5 7 4 0 to 6 16 0 to 6 8 Not Supported Not Supported 16 0 to 7 9 16 0 to 8 10 16 0 to 9 11 16 0 to 10 12 16 0 to 11 13 16 0 to 12 14 16 0 to 13 15 16 0 to 14 Table 16: WAIT Functionality Table Condition WAIT Notes CE# = ‘1’, OE# = ‘X’ or CE# = ‘0’, OE# = ‘1’ High-Z 1 CE# =’0’, OE# = ‘0’ Active 1 Synchronous Array Reads Active 1 Synchronous Non-Array Reads Active 1 All Asynchronous Reads Deasserted 1 All Writes High-Z 1,2 Notes: 1. Active: WAIT is asserted until data becomes valid, then deasserts. 2. When OE# = VIH during writes, WAIT = High-Z. |
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