Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 17 ASYNCHRONOUS SERIAL INTERFACE C (UARTC)
R01UH0042EJ0500 Rev.5.00 Page 743 of 1513
Aug 12, 2011
17.6.3 SBF transmission
When the UCnCTL0.UCnPWR bit = UCnCTL0.UCnTXE bit = 1, the transmission enabled status is entered, and SBF
transmission is started by setting (to 1) the SBF transmission trigger (UCnOPT0.UCnSTT bit).
Thereafter, a low level the width of bits 13 to 20 specified by the UCnOPT0.UCnSLS2 to UCnOPT0.UCnSLS0 bits is
output. A transmission enable interrupt request signal (INTUCnT) is generated upon SBF transmission start. Following
the end of SBF transmission, the UCnSTT bit is automatically cleared. Thereafter, the UART transmission mode is
restored.
Transmission is suspended until the data to be transmitted next is written to the UCnTX register, or until the SBF
transmission trigger (UCnSTT bit) is set.
Figure 17-10. SBF Transmission
INTUCnT
interrupt
TXDCn
12345678910111213
Stop
bit
Setting of UCnSTT bit