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IDT72421L15J Datasheet(PDF) 6 Page - Integrated Device Technology |
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IDT72421L15J Datasheet(HTML) 6 Page - Integrated Device Technology |
6 / 14 page COMMERCIALANDINDUSTRIAL TEMPERATURERANGES IDT72421/72201/72211/72221/72231/72241/72251 CMOS SyncFIFO™ 64 x 9, 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 6 Figure 3. Offset Register Location and Default Values 86 0 Empty Offset (LSB) Reg. Default Value 007H 80 Full Offset (LSB) Reg. Default Value 007H 87 0 Empty Offset (LSB) Reg. Default Value 007H 80 Full Offset (LSB) Reg. Default Value 007H 7 80 Empty Offset (LSB) Default Value 007H 80 Full Offset (LSB) Default Value 007H IDT72421 - 64 x 9-BIT IDT72201 - 256 x 9-BIT IDT72211 - 512 x 9-BIT 7 7 80 (MSB) 1 80 0 0 80 87 0 Empty Offset (LSB) Reg. Default Value 007H 80 Full Offset (LSB) Reg. Default Value 007H 7 87 0 Empty Offset (LSB) Reg. Default Value 007H 80 Empty Offset (LSB) Default Value 007H IDT72221 - 1,024 x 9-BIT IDT72231 - 2,048 x 9-BIT IDT72241 - 4,096 x 9-BIT 7 80 80 (MSB) 0000 2 (MSB) 000 3 80 (MSB) 00 1 80 (MSB) 00 1 5 65 80 8 0 8 (MSB) 1 0 IDT72251 8,192 x 9-BIT 80 Empty Offset (LSB) Default Value 007H 7 80 (MSB) 00000 4 87 0 Full Offset (LSB) Reg. Default Value 007H 80 2 (MSB) 000 80 Full Offset (LSB) Default Value 007H 7 80 (MSB) 0000 3 80 Full Offset (LSB) Default Value 007H 7 80 (MSB) 00000 4 2655 drw 05 Thecontentsoftheoffsetregisterscanbereadontheoutputlineswhenthe WriteEnable2/Load(WEN2/ LD)pinissetLOWandbothReadEnables(REN1, REN2) are set LOW. Data can be read on the LOW-to-HIGH transition of the Read Clock (RCLK). A read and write should not be performed simultaneously to the offset registers. |
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