Specifications

V850E2/MN4 UARTJ Control
R01AN0926EJ0100 Rev.1.00 Page 8 of 30
Feb 07, 2012
4.1.2 Receive Interrupt Processing
When data is received via the UARTJ, the data in the receive FIFO is read. If the stage of the receive FIFO matches the
value set in the URTJnSLRP, a receive interrupt occurs.
During receive interrupt processing, data is read from the receive FIFO and the receive data is stored in the user receive
array the number of times the data has been received. After all of the receive data is stored in the user receive array, a
flag (regarded as a reception end flag) in the internal RAM is set to 1, indicating that all data (16 bytes) have been
stored in the user receive array.
Receive interrupt
INTUAJ3TIR
Set reception end flag to 1
NO
YES
Does the number of
times recieve
FIFO reads exceed
URTJ3SSRW4-0?
Store data read from recieve
FIFO in recieve buffer
End of processing
INTUAJ3TIR interrupt processing
Figure 4.2 Receive Interrupt Processing