UPD78F1502AGK-GAK-AX Datasheet, PDF (547/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
(4) Processing flow (in continuous transmission mode)
Figure 14-74. Timing Chart of UART Transmission (in Continuous Transmission Mode)
SSmn
STmn
SEmn
SDRmn
Transmit data 1
Transmit data 2
Transmit data 3
TxDq pin
Shift
register mn
INTSTq
MDmn0
ST
Transmit data 1
Shift operation
P SP ^ST
Transmit data 2
Shift operation
P SP ST
Transmit data 3
Shift operation
P SP
Data transmission (7-bit length)
Data transmission (7-bit length)
Data transmission (7-bit length)
TSFmn
BFFmn
<1> <2><3>
<2>
(Note)
<3>
<2>
<3>
<4>
<5> <6>
Note When transmit data is written to the SDRmn register while BFFmn = 1, the transmit data is overwritten.
Caution The MDmn0 bit can be rewritten even during operation.
However, rewrite it before transfer of the last bit is started, so that it has been rewritten before the
transfer end interrupt of the last transmit data.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0, 2), q: UART number (q = 0 to 3)
R01UH0004EJ0501 Rev.5.01
531
Jun 20, 2011