Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 835
Dec 10, 2015
(1) Register setting
Figure 15-25. Example of Contents of Registers for Master Transmission of 3-Wire Serial I/O
(CSI00, CSI01, CSI10, CSI11) (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
0 0 0 0 0 0
STSmn
0 0
SISmn0
0 1 0 0
MDmn2
0
MDmn1
0
MDmn0
0/1
Operation clock (fMCK) 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
0
DAPmn
0/1
CKPmn
0/1 0 0
PTCmn1
0
PTCmn0
0
DIRmn
0/1 0
SLCmn1
0
SLCmn0
0
DLSmn3
0/1
DLSmn2
0/1
DLSmn1
0/1
DLSmn0
0/1
Selection of data transfer sequence
0: Inputs/outputs data with MSB first
1: Inputs/outputs data with LSB first.
Selection of the data and clock
phase (For details about the
setting, see 15.3 Registers
Controllin
g
Serial Arra
y
Unit.
)
Setting of data length
(c) Serial data register mn (SDRmn)
(1) When operation is stopped (SEmn = 0)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SDRmn
Baud rate setting
(division setting of operation clock (fMCK)
0 0 0 0 0 0 0 0 0
(2) When operation is in progress (SEmn = 1) (Lower 8 bits: SDRpL)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SDRmn
Transmit data setting
(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 0 0
CKOm1
0/1
CKOm0
0/1 0 0 0 0 0 0
SOm1
0/1
SOm0
0/1
Communication starts when these bits are 1 if the clock
phase is forward (the CKPmn bit of the SCRmn = 0). If the
clock phase is reversed (CKPmn = 1), communication
starts when these bits are 0.
Remarks 1. m: Unit number (m = 0, 1), n: Channel number (n = 0, 1), p: CSI number (p = 00, 01, 10, 11),
mn = 00, 01, 10, 11
2. : Setting is fixed in the CSI master transmission mode, : Setting disabled (set to the initial value)
0/1: Set to 0 or 1 depending on the usage of the user
SDRpL

Renesas RL78 Series Specifications

General

Brand	Renesas
Model	RL78 Series
Category	Computer Hardware
Language	English