CHAPTER 14 SERIAL ARRAY UNIT
Page 378 of 920
(4) Processing flow (in continuous transmission/reception mode)
Figure 14 - 46 Timing Chart of Master Transmission/Reception (in Continuous Transmission/Reception Mode)
(Type 1: DAPmn = 0, CKPmn = 0)
Note 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.
Note 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.
Remark
<1> to <8> in the figure correspond to <1> to <8> in Figure 14 - 47 Flowchart of Master Transmission/Reception (in
Continuous Transmission/Reception Mode).
<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
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