Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 Hi, anybody
I tested tca9539-Q1.
I read datasheet of tca9539.
So, I understand the slave address this ic 0x74 / (A1, A0 is LOW, 1110100)
and to use it only read function, 0xE9 (1110100…
Part Number: TCA9539-Q1 Dear team,
Due to SOC's power on sequence, we give 3.3V signal to 9539's input port before powering on 9539. Will this affect the normal operation of our chip?
Thanks & Best Regards,
Sherry
Part Number: TCA9539-Q1 Dear team,
We don't plan to use RESET pin, so we connect this pin to VSYS_3V3 with a pullup resistor. But we found that INT pin is always low when RESET connect to VSYS.
in addition, VCC connects to VSYS_3V3, and this power…
Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 Dear team,
In BCM design, the input signal will connected to the IO EXPANDER directly, the input signal is 0~24V.
As the IO EXPANDER’s power rail is 3.3V / 5V, normally the GPIO of…
Part Number: TCA9539-Q1 Hello,
Is it possible to perform a schematic review of the attached document?
Thanks in advance,
B.CHERDLE
06-InternalPeripherals.pdf
Part Number: TCA9539-Q1 Dear team,
My customer connects to the wrong pin for the reset pin in the A sample board, but they need to test this board before B sample board is completed, so they have to disconnect reset pin and GPIO pin of SOC. Under this…
Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 I configured the pins of TCA9539 as outputs.
I found that when the chip is powered on, all output pins will have a high level for a short time.
What is the cause? Will it interfere with external…
Part Number: TCA9539-Q1 Hello, I am using TCA9539-Q1 (IO Expander). I am attaching my schematic. I want to use IO expander as OUTPUT so I have configured both port as output. I need the output to be low at power up so I write "0x00" to both output port…
Part Number: TCA9539-Q1 Other Parts Discussed in Thread: SN74LVC1G80-Q1 , , SN74HCS74-Q1 Dear team,
According to below description, INT pin will be low when input signal has rising or falling edge. My customer hopes that INT pin only be triggered by rising…
