TCA5405: TCA5405RUGR

Piet Vaes

Intellectual 410 points

Part Number: TCA5405

Tool/software:

Hello

Can somebody help me to program the output extender TCA5405 using an ARM M0+ running on 16 MHz

Best Regards,

Piet

8 months ago

0 Clemens Ladisch 8 months ago

Guru 317450 points

The DIN signal is designed for an UART output with eight data bits and no parity. Use any baud rate between 10 kBd and 1 MBd, and arrange the bits as shown on p. 4. Note that S0 is the start bit that is not part of the data byte, and that an UART transmits the LSB first, so you have 101 in the three lowest bits, and the data bits in the five upper bits of the byte.

It is also possible to generate this signal with SPI, but then you have to control all nine bits (i.e., in practice, transmit 16 bits).