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VG3617801CT Datasheet(PDF) 20 Page - Vanguard International Semiconductor |
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VG3617801CT Datasheet(HTML) 20 Page - Vanguard International Semiconductor |
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20 / 68 page ![]() Document:1G5-0133 Rev.1 Page 20 VIS VG3617801CT 16Mb CMOS Synchronous Dynamic RAM 9.READ/WRITE Command Interval 9.1 READ to READ command interval When a new READ command is asserted during a READ cycle, it will be effective after the CAS latency, even if the previous READ operation has not completed. READ will be interrupted by another READ. A READ command can be asserted in every clock without restriction. READ to READ Command Interval 9.2 WRITE to WRITE Command Interval When a new WRITE command is asserted during a WRITE cycle, the previous burst will be terminated and the new burst will begin with the new WRITE command. WRITE will be interrupted by another WRITE. A WRITE command can be asserted in every clock without restriction. WRITE to WRITE Command Interval Burst lengh=4, CAS latency=2 CLK Command DQ QA0 QB2 QB1 QB0 Read A T0 T1 T2 T3 T4 T5 T6 T7 Hi-Z_ T8 1 cycle QB3 Read B Burst lengh=4, CAS latency=2 CLK Command DQ QA0 QB2 QB1 QB0 Write A T0 T1 T2 T3 T4 T5 T6 T7 Hi-Z_ T8 1 cycle QB3 Write B |
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