Part Number: PCF8574 Other Parts Discussed in Thread: , TM4C129ENCPDT , P82B715 I am writing to PCF8574 and PCF8574A devices using the TI driver under TIRTOS.
TM4C129ENCPDT processor, latest TIRTOS available for this processor is being used.
The writes…
Measuring a voltage above zero shows that the output tries to drive high, so the I²C communication should be OK.
The ULN has a typical off-state input current of 65 µA, and requires more to switch on. Apparently, the NXP device outputs a little bit…
Part Number: PCF8574 I am using two pcf9574. one ic is configured as input and another one for output.
but sometimes conflict happens between two ic.
can you provide any reference schematics for multiple ic interfacing?
Please let me know any sol…
Part Number: PCF8574 Other Parts Discussed in Thread: TCA9534 Looking for a I/O port expander alternative to PCF8574 with output LOW I/O upon initialization instead of output HIGH with this part. Preferably pin compatible and using the same I2C addressing…
Part Number: PCF8574 I'm using pcf8574 to connect my external switches. Actually, the switch was connected far away from the device through the wire.
if the wire length is below 25 feet, the switch was working fine with pcf8574.No issues
But if…
Part Number: MSP-EXP430FR5994 Hi,
unfortunately I have problems with the control of an LCD via I2C. I can't connect to the LCD. I'm using the following ASM code in CCS:
;------------------------------------------------------------------------…
Part Number: PCF8574 Other Parts Discussed in Thread: MSP430F5438A Hi,
I am using I2C3 (USCI) module as a master and PCF8574 as slave. I am using MSP430F5438A microcontroller.
I wanted to write the values of 0x08, 0x04, 0x00 to toggle the (P2, P3) port…
Part Number: PCF8574 Hi, support team
My customer has the questions as follow:
Is there any difference between PCF8574DWR production batches in 2015 and 2021?
Our board products can work normally when we use PCF8574DWR's 2015 batch, But it cannot…
Part Number: PCF8574 Other Parts Discussed in Thread: PCF8575 I am evaluating the PCF8574 as an output ports expander and have three questions:
1-
Section 6.6 I2 C Interface Timing Requirements of the data-sheet states that maximum I²C bus speed is 100 kHz…
I've already mentioned the I2C TI Driver which you should reference to communicate with the PCF8574 I/O expander. You should review the datasheet of that device closely and make the hardware connections accordingly. You can contact the Interface Forum…