• BSDL model  for CY37128VP84-83YMB

    Question: Is there a BSDL model available for CY37128VP84-83YMB?   Answer:  BSDL file for the part is available on our website at the link: http://www.cypress.com/?mpn=CY37128VP84-83JI Please be noted ou...
    reshmir_26
    created by reshmir_26
  • Data retention life for CY7C343B-25HC

    Question: What is the data retention life for CY7C343B-25HC?   Answer: The Data Retention of CY7C343B-25HC devices is guaranteed to be 10 years under normal operating conditions. The retention of the data is in...
    reshmir_26
    created by reshmir_26
  • Program & Verify for svf file

    Question: Can I select either 'program only' or 'verify only' for generating svf file for a CY37032VP44-100A when using ISR 4.0?   Answer:  The SVF file format  has the single option "Program & ...
    reshmir_26
    created by reshmir_26
  • Reading back Jedec file

    Question: How to read back the Jedec file from the CPLD?   Answer:   Once you open the ISR software in "Help" menu you can find "Read Operation" description.To read back the Jedec file from the device use ...
    reshmir_26
    created by reshmir_26
  • Programming Flash370i family of devices

    Question: How to Programming Flash370i family of devices?   Answer:  The Flash370i family of devices were supported by programming cable : ISRPCCABLE, this cable is supported only with ISR2.2 software. Thi...
    reshmir_26
    created by reshmir_26
  • CPLD checksum

    Question: What is meant by CPLD checksum and what does a checksum error indicate?   Answer:  Checksum is a value calculated, by the programmer, from the data stream used to program the device. There is no ...
    reshmir_26
    created by reshmir_26
  • SPLDs for New Designs

    Question: If I am designing a new design using an SPLD, which one should I use?   Answer: We recommend using the Ultra37000 CPLD devices for new designs. The Ultra37000 CPLDs is a different family of products w...
    userc_44961
    created by userc_44961
  • Use of the CEO/A2 in a Single Chip Configuration

    Question: What do I do with the CEO/A2 pin if I only use one EEPROM?   Answer: The /CEO output of any CY3LV drives the /CE input of the next CY3LV in a cascaded chain of EEPROMs. This is an output that will sta...
    userc_44961
    created by userc_44961
  • Functionality Problem with Ultra37000V CPLD Despite Passing Simulation

    Question: 1. A pin gets pulled low even though the simulation shows it correct? 2. I get daisy chain errors, why?   Answer: Please check the power supply voltages. There are instances where a 5V power supply ha...
    userc_44961
    created by userc_44961
  • Hysteresis on Input of Cypress Quantum38K CPLDs

    Question: Do Quantum38K CPLDs have hysteresis on the inputs?   Answer: Quantum38K CPLD's do not have explicit input hysteresis, but the effect of the bus hold circuit (if enabled) on the input may look like hys...
    userc_44961
    created by userc_44961
  • Are military parts vacuum sealed?

    Question: Are military parts vacuum sealed?   Answer: Unfortunately, these devices are not vacuum sealed. They are, however, hermetically sealed, but there is atmospheric pressure inside the device. For more in...
    userc_44961
    created by userc_44961
  • Issues with Pins Locked to a Certain Level Despite Simulation

    Question: 1.I have a pin that is unresponsive despite all attempts to drive the signal? 2.The functional simulation shows that it should work, but it doesn't. Help?   Answer: Issues of this kind usually result ...
    userc_44961
    created by userc_44961
  • Why tS > tSPT for Ultra 37000 CPLDs

    Question: Why is tS > tSPT?   Answer: Setup is the amount of time before the clock edge when the data must be static. Consider the two input paths in two arbitrary devices with made-up timing numbers -- for ...
    userc_44961
    created by userc_44961
  • Thermal Information for Cypress Flash370i CPLDs

    Question: 1. What is the Theta JA value for the 37xi? 2. What is the Theta JC value for the 37xi?   Answer: The Thermal information is located in the table that follows:       ...
    userc_44961
    created by userc_44961
  • Differences Between Revision A and Revision B of Ultra 37000 CPLDs

    Question: Ultra37000, Ultra 37k, 37k, 37000, 37032, 37064, 37128, 37192, 37256, 37384, 37512 revision, silicon, rev, die, change, update   Answer: Revision B changed the manufacturing process slightly to improv...
    userc_44961
    created by userc_44961
  • ISR Failures during Flash 370 and Flash 370i Programming

    Question: Why is ISR failing programming?   Answer: The Flash JAM driver uses a high performance counter located on all PC motherboards, and assumes that it counts at a certain rate. However, if the counter doe...
    userc_44961
    created by userc_44961
  • Boundary Scan on Flash370 and Flash370i CPLDs

    Question: Can I perform a boundary scan on the Flash 370 and Flash 370i devices?   Answer: Unfortunately, there is no way to perform a boundary scan on these devices. Cypress started to incorporate this feature...
    userc_44961
    created by userc_44961
  • Transparent Latches in Ultra 37000 CPLDs

    Question: Can I implement a transparent latch in an Ultra 37000 device?   Answer: Unfortunately, the CPLD's registers are unable to implement a true transparent latch. However, the same function is usually achi...
    userc_44961
    created by userc_44961
  • Security Bit in the Ultra 37000

    Question: 1. What does the security bit do? 2. How do I set the security bit? 3. Can I recover a design from a device programmed with the security bit?   Answer: The security bit is a programmable field in the ...
    userc_44961
    created by userc_44961
  • Do MAX340 EPLDs Have Internal Oscillators?

    Question: Do MAX340 EPLDs Have Internal Oscillators?   Answer: Unfortunately, the MAX340 series of devices do not have internal oscillators. This feature can be found on the Cypress Delta39K family of CPLDs. ...
    userc_44961
    created by userc_44961