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2016-01-0027

PT0556-1

02/15/16

10

PI4IOE5V9522

4-bit I

low power I/O port with interrupt and reset

f. Bus Transaction

Data is transmitted to the PI4IOE5V9522 using the Write mode as shown in Figure 5.Data is read from the PI4IOE5V9522

using the read mode as shown in Figure 7.These devices do not implement an auto-increment function, so once a command byte

has been sent, the register which was addressed will continue to be accessed by reads until a new command byte has been sent.

Figure 5: Write to output registers

Figure 6: Write to polarity inversion registers

Figure 7: Read from registers

Note: Transfer can be stopped at any time by a STOP condition.