RL78/G13 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0146EJ0100 Rev.1.00 687
Sep 22, 2011
(1) Register setting
Figure 12-109. Example of Contents of Registers for Data Transmission of Simplified I
2
C (IIC00, IIC01, IIC10, IIC11,
IIC20, IIC21, IIC30, IIC31) (1/2)
(a) Serial mode register mn (SMRmn) … Do not manipulate this register during data
transmission/reception.
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
1
MDmn1
0
MDmn0
0
(b) Serial communication operation setting register mn (SCRmn) … Do not manipulate the bits of this
register, except the TXEmn and
RXEmn bits, during data
transmission/reception.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SCRmn
TXEmn
1
RXEmn
0
DAPmn
0
CKPmn
0
0
EOCmn
0
PTCmn1
0
PTCmn0
0
DIRmn
0
0
SLCmn1
0
SLCmn0
1
0
1
DLSmn1
1
DLSmn0
1
(c) Serial data register mn (SDRmn) (lower 8 bits: SIOr)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SDRmn
Baud rate setting
0
Transmit data setting
(d) Serial output register m (SOm) … Do not manipulate this register during data
transmission/reception.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SOm
0
0
0
0
CKOm3
0/1
Note
CKOm2
0/1
Note
CKOm1
0/1
Note
CKOm0
0/1
Note
0
0
0
0
SOm3
0/1
Note
SOm2
0/1
Note
SOm1
0/1
Note
SOm0
0/1
Note
(e) Serial output enable register m (SOEm) … Do not manipulate this register during data
transmission/reception.
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
1
SOEm2
1
SOEm1
1
SOEm0
1
Note The value varies depending on the communication data during communication operation.
Remarks 1. m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), r: IIC number (r = 00, 01, 10, 11, 20, 21,
30, 31), mn = 00 to 03, 10 to 13
2. : Setting is fixed in the IIC 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
SIOr
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