topic Re: JN5189 I/O current capability? in Wireless MCU

JN5189 I/O current capability?

alnasl — Wed, 18 Jan 2023 02:28:50 GMT

Hi, I'm looking for the information about I/O current capability for the JN5189.

In the JN516x datasheet, there was a parameter called "Current sink/source capability" in the "I/O Characteristics" section, but there is no equivalent entry for the JN5189.

Usually, Cortex-M4 uCs have parameters like I_OH and I_OL (It's called "HIGH-level output current" and "LOW-level output current" in the LPC4000 series).

Am I missing something?

Thanks in advance!

Re: JN5189 I/O current capability?

EduardoZamora — Fri, 20 Jan 2023 17:54:16 GMT

Hello @alnasl,

I truly apologize for the late response.

Could you please refer to JN5189 Data Sheet Section 13.3 IO Characteristics, Table 17 IO Characteristics? According to the expected load, then the VoL and VoH of the IOs are different.

For Low Speed IOs, max current should be 2mA per IO (IOs 0 to 9 and 12 to 16).
For High Speed IOs, max current should be 5mA per IO (IOs 17 to 21).
For IO with I2C, max current should be 2mA per IO.

Regards,
Eduardo.

Re: JN5189 I/O current capability?

alnasl — Mon, 23 Jan 2023 00:20:46 GMT

Thank you Eduardo.
I noticed that, but there’s no description about “maximum” current.
Can I take your answer as official information based on chip design?
Regards,

Re: JN5189 I/O current capability?

EduardoZamora — Mon, 23 Jan 2023 21:50:31 GMT

Hi,

Please consider these values as max for your design.

Regards,
Eduardo.

Re: JN5189 I/O current capability?

alnasl — Tue, 24 Jan 2023 00:02:18 GMT

Hello,

Thank you for your response.

I'll use these values for my design.

Regards,