CY7C65213 / CY7C65213A unused input pin for 28-pin SSOP

[YoIs_1298666]

Hello,

I have two questions.

1. We can see the Notes [3. 4.] on CY7C65213-32LTXI / CY7C65213A-32LTXI (32-pin QFN) .

     There are no notes on CY7C65213-28PVXI / CY7C65213A-28PVXI (28-pin SSOP) .

     Do the Notes [3. 4.] also apply to  CY7C65213-28PVXI / CY7C65213A-28PVXI (28-pin SSOP) ?

2. All Input pins require an external pullup, what does the following mean?

Best regards,

Yocchi

[Pranava_YN · Accepted solution]

Hi,

Please find my answers to your above questions.

1. Yes, those notes apply to all part numbers.

2. As stated in the datasheet Note 5 - "Any GPIO, configured as “Input” should either be pulled high or low. A floating input pin (Tristate) has an indeterminate voltage level that can cause excess internal
current consumption. A 10 kΩ pull-up or pull-down resistor is recommended on each of the input pin."

The above note applies for GPIO pins. UART pins in CY7C65213/CY7C65213A have internal pull-ups. The Table 2. you have shared refers to disabling those internal pull-ups during suspend mode in order to reduce current consumption of the chip.

Do let me know if you need any further clarifications.

[YoIs_1298666]

Hello Pranava-san,

Thank you very much for your help.

Does "UART pins in CY7C65213/CY7C65213A have internal pull-ups." mean that RXD, DSR#,DCD# and CTS# have internal pull-ups?

Best regards,

Yocchi

[Pranava_YN]

Hi Yocchi-san,

Does "UART pins in CY7C65213/CY7C65213A have internal pull-ups." mean that RXD, DSR#,DCD# and CTS# have internal pull-ups?

>> Yes, they have internal pull-ups. 

[YoIs_1298666]

Hello Pranava-san,

I greatly appreciate your kindness.

Best regards,

Yocchi