RL78/G1P
CHAPTER 11 SERIAL ARRAY UNIT
R01UH0895EJ0100 Rev.1.00
420
Nov 29, 2019
(1) Register setting
Figure 11-91. Example of Contents of Registers for Slave Transmission/Reception of Slave Select Input Function
(CSI00) (1/2)
(a) Serial mode register mn (SMRmn)
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
SMRmn
CKSmn
0/1
CCSmn
1
0
0
0
0
0
STSmn
0
0
SISmn0
0
1
0
0
MDmn2
0
MDmn1
0
MDmn0
0/1
Operation clock (f
MCK
) of channel n
0: Prescaler output clock CKm0 set by the SPSm register
1: Prescaler output clock CKm1 set by the SPSm register
Interrupt source of channel n
0: Transfer end interrupt
1: Buffer empty interrupt
(b) Serial communication operation setting register mn (SCRmn)
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
SCRmn
TXEmn
1
RXEmn
1
DAPmn
0/1
CKPmn
0/1
0
EOCmn
0
PTCmn1
0
PTCmn0
0
DIRmn
0/1
0
SLCmn1
0
SLCmn0
0
0
1
DLSmn1
1
DLSmn0
0/1
Selection of data transfer sequence
0: Inputs/outputs data with MSB first
1: Inputs/outputs data with LSB first.
Setting of data length
0: 7-bit data length
1: 8-bit data length
Selection of the data and clock
phase (For details about the
setting, see
11.3 Registers
Controlling Serial Array Unit
.)
(c) Serial data register mn (SDRmn) (lower 8 bits: SIOp)
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
SDRmn
0000000
Baud rate setting
0
Transmit data setting/receive data register
(d)
Serial output register m (SOm) … Sets only the bits of the target channel.
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
SOm
0
0
0
0
CKOm3
CKOm2
CKOm1
CKOm0
0
0
0
0
SOm3
SOm2
SOm1
SOm0
0/1
(e) Serial output enable register m (SOEm) … Sets only the bits of the target channel to 1.
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
SOEm
0
0
0
0
0
0
0
0
0
0
0
0
SOEm3
SOEm2
SOEm1
SOEm0
0/1
Caution Be sure to set transmit data to the SlOp register before the clock from the master is started.
Remarks 1.
m: Unit number (m = 0), n: Channel number (n = 0), p: CSI number (p = 00)
2.
: Setting is fixed in the CSI slave transmission/reception mode
: Setting disabled (set to the initial value)
×
: Bit that cannot be used in this mode (set to the initial value when not used in any mode)
0/1: Set to 0 or 1 depending on the usage of the user
SIOp