RL78/G1P
CHAPTER 11 SERIAL ARRAY UNIT
R01UH0895EJ0100 Rev.1.00
366
Nov 29, 2019
(4) Processing flow (in continuous transmission/reception mode)
Figure 11-46. Timing Chart of Master Transmission/Reception (in Continuous Transmission/Reception Mode)
(Type 1: DAPmn = 0, CKPmn = 0)
<4>
<5>
Receive data 3
Reception & shift operation
Reception & shift operation
<1>
<2>
<3>
<2>
<3>
<4> <2>
<7>
<8>
Note 1
<6>
<3>
Reception & shift operation
SSmn
SEmn
SDRmn
SCKp pin
SIp pin
Shift register mn
SOp pin
TSFmn
BFFmn
MDmn0
STmn
INTCSIp
Note 2
Note 2
Data transmission/reception
Data transmission/reception
Data transmission/reception
Transmit data 2
Transmit data 1
Transmit data 3
Receive data 2
Receive data 1
Receive data 3
Transmit data 1
Transmit data 2
Transmit data 3
Receive data 1
Receive data 2
Write
Write
Write
Read
Read
Read
Notes 1.
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.
2.
The transmit data can be read by reading the SDRmn register during this period. At this time, the
transfer operation is not affected.
Caution The MDmn0 bit of serial mode register mn (SMRmn) 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.
Remarks 1.
<1> to <8> in the figure correspond to <1> to <8> in
Figure 11-47 Flowchart of Master
Transmission/Reception (in Continuous Transmission/Reception Mode
).
2.
m: Unit number (m = 0), n: Channel number (n = 0), p: CSI number (p = 00), mn = 00