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W631GG6KB-15 Datasheet(PDF) 42 Page - Winbond |
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W631GG6KB-15 Datasheet(HTML) 42 Page - Winbond |
42 / 158 page W631GG6KB Publication Release Date: Feb. 27, 2013 Revision A04 - 42 - 7.13 READ Operation 7.13.1 READ Burst Operation During a READ or WRITE command, DDR3 will support BC4 and BL8 on the fly using address A12 during the READ or WRITE (AUTO PRECHARGE can be enabled or disabled). A12 = 0, BC4 (BC4 = burst chop, tCCD = 4) A12 = 1, BL8 A12 is used only for burst length control, not as a column address. TRANSITIONING DATA T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 CK# CK Command* 3 READ Address* 4 NOP NOP NOP NOP NOP NOP NOP Bank Col n DON'T CARE DQS, DQS# DQ* 2 CL = 6 Dout n Dout n+1 RL = AL + CL tRPRE Dout n+2 Dout n+3 Dout n+4 Dout n+5 Dout n+6 Dout n+7 tRPST NOP NOP NOP Notes: 1. BL8, RL = 6, AL = 0, CL = 6. 2. Dout n = data-out from column n. 3. NOP commands are shown for ease of illustration; other commands may be valid at these times. 4. BL8 setting activated by either MR0 A[1:0] = 00 or MR0 A[1:0] = 01 and A12 = 1 during READ command at T0. Figure 21 – READ Burst Operation RL = 6 (AL = 0, CL = 6, BL8) TRANSITIONING DATA T0 T1 T5 T6 T10 T11 T12 T13 T14 T15 T16 CK# CK Command* 3 READ Address* 4 NOP NOP NOP NOP NOP NOP NOP Bank Col n DON'T CARE DQS, DQS# DQ* 2 CL = 6 Dout n Dout n+1 RL = AL + CL tRPRE Dout n+2 Dout n+3 Dout n+4 Dout n+5 Dout n+6 Dout n+7 tRPST NOP NOP NOP AL = 5 TIME BREAK Notes: 1. BL8, RL = 11, AL = (CL - 1), CL = 6. 2. Dout n = data-out from column n. 3. NOP commands are shown for ease of illustration; other commands may be valid at these times. 4. BL8 setting activated by either MR0 A[1:0] = 00 or MR0 A[1:0] = 01 and A12 = 1 during READ command at T0. Figure 22 – READ Burst Operation RL = 11 (AL = 5, CL = 6, BL8) |
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