Figure 10.7 (A) Rdrf Setting And Rxi Interrupt; Figure 10.7 (B) Tdre Setting And Txi Interrupt; Figure 10.7 (C) Tend Setting And Tei Interrupt - Renesas H8/3847R Series Hardware Manual

Section 10 Serial Communication Interface
RDR
RSR (reception in progress)
RXD pin
3x
RDRF = 0
TDR (next transmit data)
TSR (transmission in progress)
TXD pin
3x
TDRE = 0
TDR
TSR (transmission in progress)
TXD pin
3x
Rev. 6.00 Aug 04, 2006 page 378 of 680
REJ09B0145-0600

Figure 10.7 (a) RDRF Setting and RXI Interrupt

Figure 10.7 (b) TDRE Setting and TXI Interrupt

TEND = 0

Figure 10.7 (c) TEND Setting and TEI Interrupt

RDR
RSR↑ (reception completed, transfer)
RXD pin
3x
RDRF ← 1
(RXI request when RIE = 1)
TDR
TSR↓ (transmission completed, transfer)
TXD pin
3x
TDRE ← 1
(TXI request when TIE = 1)
TDR
TSR (reception completed)
TXD pin
3x
TEND ← 1
(TEI request when TEIE = 1)