P9242-R3/RB Datasheet

© 2019 Integrated Device Technology, Inc.

26

May 17, 2019

Figure 27. State Diagram for User Data Transmission from the P9242-R3 to the P9221-R3

Is P9242-R3 in the

power transfer phase

(register 06E0HEX = 09HEX)?

Load outgoing user data registers

(registers 0805HEX to 080EHEX) and

set the number of bytes to be

transferred in bits [6:3] in register

0800HEX accordingly

Is the communication

channel free (bit 0 of

register 0800HEX = “0”)

Yes

Yes

Set bit 0 of register 0800HEX to “1” to

trigger the communication

The P9242-R3 will reset bit 0 of

register 0800HEX to “0” after sending

the data into the channel

9.2 Reading Data Sent from the P9221-R3

The 9242-R3 can receive 8 bytes of information at a time. When the P9242-R3 receives data from the P9221-R3, it will generate an interrupt

to the external MCU on the transmitter by pulling down the interrupt pin. The MCU can respond to the interrupt and read the data received flag

in register 0801HEX bit 0 to confirm that the interrupt is generated because of the new incoming data. The Data_Received_Flag (register 0801HEX

bit [0]) is set to 1BIN when there is new incoming data.