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RL78/G1P
CHAPTER 11 SERIAL ARRAY UNIT
R01UH0895EJ0100 Rev.1.00
442
Nov 29, 2019
(4) Processing flow (in continuous transmission mode)
Figure 11-106. Timing Chart of UART Transmission (in Continuous Transmission Mode)
P
Shift operation
Shift operation
ST
ST
P
ST
P SP
<1>
<2>
<2>
<3>
Note
<2>
<3>
<5>
<6>
<3>
<4>
SP
SP
Shift operation
SSmn
SEmn
SDRmn
TxDq pin
Shift register mn
INTSTq
TSFmn
BFFmn
MDmn0
STmn
Data transmission
Data transmission
Data transmission
Transmit data 2
Transmit data 1
Transmit data 3
Transmit data 3
Transmit data 2
Transmit data 1
Note
If transmit data is written to the SDRmn register while the BFFmn bit of serial status register mn (SSRmn) is
1 (valid data is stored in serial data register mn (SDRmn)), the transmit data is overwritten.
Caution The MDmn0 bit of serial mode register mn (SSRmn) can be rewritten even during operation.
However, rewrite it before transfer of the last bit is started, so that it will be rewritten before the
transfer end interrupt of the last transmit data.
Remark
m: Unit number (m = 0), n: Channel number (n = 0), q: UART number (q = 0), mn = 00
Summary of Contents for RL78/G1P
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