HD6473837H Datasheet, PDF (286/562 Pages) Renesas Technology Corp – Hardware Manual

RDR
RDR
RXD
pin
RSR (receiving)
RDRF = 0
RXD
pin
RSR ↑ (received and transferred)
RDRF ^← 1
(RXI requested if RIE = 1)
Figure 10.8 (a) RDRF Setting and RXI Interrupt
TDR (next transmit data)
TDR
TXD
pin
TSR (transmitting)
TDRE = 0
TXD
pin
TSR ↓ (transmission complete,
next data transferred)
TDRE ^←1
(TXI requested if TIE = 1)
Figure 10.8 (b) TDRE Setting and TXI Interrupt
TDR
TDR
TXD
pin
TSR (transmitting)
TEND = 0
TXD
pin
TSR (transmission end)
TEND ^←1
(TEI requested if TEIE = 1)
Figure 10.8 (c) TEND Setting and TEI Interrupt
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