Clocks Forum Discussions

Hi Community,

I have some questions relating to the CY2545 you helped us get info on. Any help in getting answers to these questions would be much appreciated.

• Is there any example code or application notes on how to use this chip?
• The programming spec suggests that VDD for the device must be 2.1V, yet the publicly available datasheet says that VDD must be 2.5V, 3.0V, or 3.3V.
• Should we be able to communicate with the device over I2C, at 3.3V logic levels, without entering programming/test mode? 
• Will the device only acknowledge I2C communication in programming/test mode?
• Is it possible to communicate with and configure the device to function each time it powers on, without having to send Vpp-program pulses at 8.25V? In other words - is it possible to configure the chip, without permanently programming it with elevated voltages?

Show Less

The clock input of the chip is 25M, requiring output of 52M for OUT13P and OUT13N, 108M for OUT14P and OUT14N, 100M for OUT23P and OUT23N, and 156.25M for OUT24P and OUT24N. Could you please provide the corresponding IIC register configuration

Show Less

I am using CY3672-FTG for programming CY22392 FXI.

Now CY3672-FTG and CY3672-USB is obsolete. Please suggest alternat kit for programming CY22392 FXI.

Show Less

Hi,

 

I am looking for phase noise specifications for the CY22394 clock generator. Where can I find information on noise performance?

 

Thanks,

 

Jim

Show Less

Hi - which device programmer do I need to purchase for programming of the CY22392?

We have inherited a existing design which we need to reproduce. It seems that the CY22392 was used as a simple divide by three, so alternately is there a simple clock divider that can be recommended for a newer design that doesn't need a hardware programmer?

Regards

Russell

Show Less

Hi supporters,

I would like to confirm crystal specifications for CY25560SXI.

ESR ,Drive level ,frequency tolerance ,and so on.

I can not find recommended crystal specifications on the datasheet.

Regards

Junichi Nagata

 

 

Show Less

While using the program provided - ClockWizard 2.1 to configure the CY27410, it was noted that the register addresses, e.g. 0x000000, 0x0186A0, are 24 bits long listed in the memory map of the results tab. This seems to contradict the information on I2C communication found in the datasheet.

On page 8 of 30 in Document Number: 001-89074 Rev. *M, it is documented that "A valid write operation must have a full 8-bit register." Furthermore, on page 9 of 30 on the same document, the following is noted: "... the CY27410 issues an acknowledge and transmits the 8-bit word."

It is clear that the datasheet of the CY27410 states that it reads and writes 8-bit words.

My question is then, why does the program ClockWizard 2.1 suggest that the addresses are 24 bits long, identified by the hex addresses listed in the results tab in the memory map section.

Show Less

Hi, I notice that the programing times of cy22381 is 100 ,in cy22381 datasheet, but when I program this part cy22381fxit, it can be programmed only once, thus it can not be programed using a different pll output file, why? is it one time programing （OTP） part ? thanks! Show Less