 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
IDT723614L15PF Datasheet(PDF) 7 Page - Integrated Device Technology |
|
||||||||||||||||||||||||||||||
IDT723614L15PF Datasheet(HTML) 7 Page - Integrated Device Technology |
|
|
7 / 39 page  7 COMMERCIAL TEMPERATURE RANGE IDT723614 CMOS SyncBiFIFO ™ WITH BUS MATCHING AND BYTE SWAPPING 64 x 36 x 2 CSB CSB W/ RRB ENB SIZ1, SIZ0 CLKB B0-B35 Outputs Port Functions H X X X X In High-Impedance State None L H L X X In High-Impedance State None L H H One, both LOW ↑ In High-Impedance State FIFO2 Write L H H Both HIGH ↑ In High-Impedance State Mail2 Write L L L One, both LOW X Active, FIFO1 Output Register None L L H One, both LOW ↑ Active, FIFO1 Output Register FIFO1 read L L L Both HIGH X Active, Mail1 Register None L L H Both HIGH ↑ Active, Mail1 Register Mail1 Read (Set MBF1 HIGH) CSA CSA W/ RRA ENA MBA CLKA A0-A35 Outputs Port Functions H X X X X In High-Impedance State None L H L X X In High-Impedance State None LH H L ↑ In High-Impedance State FIFO1 Write LH H H ↑ In High-Impedance State Mail1 Write L L L L X Active, FIFO2 Output Register None LL H L ↑ Active, FIFO2 Output Register FIFO2 Read L L L H X Active, Mail2 Register None LL H H ↑ Active, Mail2 Register Mail2 Read (Set MBF2 HIGH) ALMOST-FULL AND FS1 FS0 RST RST ALMOST-EMPTY FLAG OFFSET REGISTER (X) HH ↑ 16 HL ↑ 12 LH ↑ 8 LL ↑ 4 clock that reads data from the FIFO have not elapsed since the time the word was written. The empty flag of the FIFO is set HIGH by the second LOW-to-HIGH transition of the synchro- nizing clock, and the new data word can be read to the FIFO output register in the following cycle. A LOW-to-HIGH transition on an empty flag synchroniz- ing clock begins the first synchronization cycle of a write if the clock transition occurs at time tSKEW1 or greater after the write. Otherwise, the subsequent clock cycle can be the first syn- chronization cycle (see Figure 13 and 14). TABLE 2: PORT-A ENABLE FUNCTION TABLE TABLE 1: FLAG PROGRAMMING TABLE 3: PORT-B ENABLE FUNCTION TABLE FULL FLAG ( FFA FFA, FFB FFB) The full flag of a FIFO is synchronized to the port clock that writes data to its array. When the full flag is HIGH, a memory location is free in the SRAM to receive new data. No memory locations are free when the full flag is LOW and attempted writes to the FIFO are ignored. Each time a word is written to a FIFO, the write pointer is incremented. The state machine that controls a full flag monitors a write-pointer and read-pointer comparator that indicates when the FIFO SRAM status is full, full-1, or full-2. From the time a word is read from a FIFO, the previous memory location is ready to be written in a minimum of three cycles of the full flag synchronizing clock. Therefore, a full flag is LOW if less than two cycles of the full flag synchronizing clock have elapsed since the next memory write location has been read. The second LOW-to-HIGH transition on the full flag synchronization clock after the read sets the full flag HIGH and the data can be written in the following clock cycle. A LOW-to-HIGH transition on a full flag synchronizing clock begins the first synchronization cycle of a read if the clock transition occurs at time tSKEW1 or greater after the read. Otherwise, the subsequent clock cycle can be the first syn- chronization cycle (see Figure 15 and 16). |
Similar Part No. - IDT723614L15PF |
|
Similar Description - IDT723614L15PF |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
