Electronic Components Datasheet Search |
|
CY7C1612KV18 Datasheet(PDF) 10 Page - Cypress Semiconductor |
|
CY7C1612KV18 Datasheet(HTML) 10 Page - Cypress Semiconductor |
10 / 33 page CY7C1625KV18 CY7C1612KV18 CY7C1614KV18 Document Number: 001-16238 Rev. *K Page 10 of 33 Echo Clocks Echo clocks are provided on the QDR II to simplify data capture on high-speed systems. Two echo clocks are generated by the QDR II. CQ is referenced with respect to C and CQ is referenced with respect to C. These are free-running clocks and are synchronized to the output clock of the QDR II. In the single clock mode, CQ is generated with respect to K and CQ is generated with respect to K. The timing for the echo clocks is shown in Switching Characteristics on page 25. PLL These chips use a PLL that is designed to function between 120 MHz and the specified maximum clock frequency. During power up, when the DOFF is tied high, the PLL is locked after 20 s of stable clock. The PLL can also be reset by slowing or stopping the input clocks K and K for a minimum of 30 ns. However, it is not necessary to reset the PLL to lock to the desired frequency. The PLL automatically locks 20 s after a stable clock is presented. The PLL may be disabled by applying ground to the DOFF pin. When the PLL is turned off, the device behaves in QDR I mode (with one cycle latency and a longer access time). Application Example Figure 2 shows two QDR II used in an application. Figure 2. Application Example R = 250 ohms Vt R R = 250 ohms Vt Vt R Vt = Vddq/2 R = 50 ohms R CC# D A SRAM #2 R P S # W P S # B W S # ZQ CQ/CQ# Q K# CC# D A K SRAM #1 R P S # W P S # B W S # ZQ CQ/CQ# Q K# BUS MASTER (CPU or ASIC) DATA IN DATA OUT Address RPS# WPS# BWS# Source K Source K# Delayed K Delayed K# CLKIN/CLKIN# K |
Similar Part No. - CY7C1612KV18 |
|
Similar Description - CY7C1612KV18 |
|
|
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 |