HD64F3642AHV Datasheet, PDF (334/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 10 Serial Communication Interface
RDR
RDR
RXD pin
RSR (reception in progress)
RDRF = 0
RXD pin
↑
RSR (reception completed, transfer)
RDRF ← 1
(RXI request when RIE = 1)
Figure 10.7 (a) RDRF Setting and RXI Interrupt
TXD pin
TDR (next transmit data)
TDR
TSR (transmission in progress)
TDRE = 0
TXD pin
↓
TSR (transmission completed, transfer)
TDRE ← 1
(TXI request when TIE = 1)
Figure 10.7 (b) TDRE Setting and TXI Interrupt
TDR
TDR
TXD pin
TSR (transmission in progress)
TEND = 0
TXD pin
TSR (reception completed)
TEND ← 1
(TEI request when TEIE = 1)
Figure 10.7 (c) TEND Setting and TEI Interrupt
Rev. 6.00 Sep 12, 2006 page 312 of 526
REJ09B0326-0600