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EM636327JT-10 Datasheet(PDF) 4 Page - Etron Technology, Inc. |
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EM636327JT-10 Datasheet(HTML) 4 Page - Etron Technology, Inc. |
4 / 78 page EtronTech EM636327 Preliminary 4 December 1998 53 DSF Input Define Special Function: The DSF signal defines the operation commands in conjunction with the RAS# and CAS# and WE# signals and is latched at the positive edges of CLK. The DSF input is used to select the masked write disable/enable command and block write command, and the Special Mode Register Set cycle. 23, 56, 24, 57 DQM0 - DQM3 Input Data Input/Output Mask: DQM0-DQM3 are byte specific, nonpersistent I/O buffer controls. The I/O buffers are placed in a high-z state when DQM is sampled HIGH. Input data is masked when DQM is sampled HIGH during a write cycle. Output data is masked (two-clock latency) when DQM is sampled HIGH during a read cycle. DQM3 masks DQ31-DQ24, DQM2 masks DQ23- DQ16, DQM1 masks DQ15-DQ8, and DQM0 masks DQ7-DQ0. 97, 98, 100, 1, 3, 4, 6 , 7, 60, 61, 63, 64, 68, 69, 71, 72, 9, 10, 12, 13, 17, 18, 20, 21, 74, 75, 77, 78, 80, 81, 83, 84 DQ0- DQ31 Input/ Output Data I/O: The DQ0-31 input and output data are synchronized with the positive edges of CLK. The I/Os are byte-maskable during Reads and Writes. The DQs also serve as column/byte mask inputs during Block Writes. 36-45, 52, 58, 86-95 NC - No Connect: These pins should be left unconnected. 2, 8, 14, 22, 59, 67, 73, 79 VDDQ Supply DQ Power: Provide isolated power to DQs for improved noise immunity. 5, 11, 19, 62, 70, 76, 82, 99 VSSQ Supply DQ Ground: Provide isolated ground to DQs for improved noise immunity. 15, 35, 65, 96 VDD Supply Power Supply: +3.3V ±0.3V 16, 46, 66, 85 VSS Supply Ground |
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