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2. Re: The relationship between Output High Voltage and Current of FRAM
morimoto-n_1534561 Mar 14, 2018 10:28 PM (in response to morimoto-n_1534561)Hello Cypress,
Do you have any update on this?
I need to answer the customer by tomorrow.
Best Regards,
Naoaki Morimoto
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3. Re: The relationship between Output High Voltage and Current of FRAM
ndma Mar 14, 2018 11:35 PM (in response to morimoto-n_1534561)Hi Morimoto-san,
I have checked internally regarding your request but unfortunately we do not have the data you requested.
Thanks,
Nada
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4. Re: The relationship between Output High Voltage and Current of FRAM
morimoto-n_1534561 Mar 27, 2018 1:43 AM (in response to ndma)Hello Nada-san,
Is it possible to consider if the condition of the current value at the output high is limited to a certain value?
Best Regards,
Naoaki Morimoto
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5. Re: The relationship between Output High Voltage and Current of FRAM
user_78878863 Mar 27, 2018 12:37 PM (in response to morimoto-n_1534561)Out of curiosity: which CPU are you using? The usual threshold for CMOS inputs is Vlow=0.3xVdd and Vhi=0.7xVdd.
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6. Re: The relationship between Output High Voltage and Current of FRAM
morimoto-n_1534561 Apr 2, 2018 1:26 AM (in response to user_78878863)Hello,
Customer use Renesas RX 631.
The Min value of Vih of the connection destination MCU is specified as Vcc x 0.8,
Therefore, it becomes 2.64 V when Vcc = 3.3V.Best Regards,
Naoaki Morimoto
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7. Re: The relationship between Output High Voltage and Current of FRAM
user_78878863 Apr 2, 2018 2:10 AM (in response to morimoto-n_1534561)Which pins are you using for the FRAM connection? the input threshold voltages differ by pin
If you want to have more detailed information about the FRAM output voltages, you should create a support case (top right menu, 'my cases'). I think you should be safe since the input currents of the MCU should be much lower than the 2mA where the FRAM output voltages are specified. If you want to be 100% sure, you need a buffer inbetween.