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RL78/G1A CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00 400
Jul 04, 2013
CHAPTER 12 SERIAL ARRAY UNIT
A single serial array unit has up to four serial channels. Each channel can achieve 3-wire serial (CSI), UART, and
simplified I
2
C communication.
Function assignment of each channel supported by the RL78/G1A is as shown below.
• 25-pin products
Unit Channel Used as CSI Used as UART
Used as Simplified I
2
C
0 CSI00 IIC00
1
−
UART0
−
2
− −
0
3 CSI11
UART1
IIC11
• 32-pin products
Unit Channel Used as CSI Used as UART
Used as Simplified I
2
C
0 CSI00 IIC00
1
−
UART0
−
2
− −
0
3 CSI11
UART1
IIC11
0 CSI20 IIC20 1
1
−
UART2 (supporting LIN-bus)
−
• 48-pin products
Unit Channel Used as CSI Used as UART
Used as Simplified I
2
C
0 CSI00 IIC00
1 CSI01
UART0
IIC01
2
− −
0
3 CSI11
UART1
IIC11
0 CSI20 IIC20 1
1 CSI21
UART2 (supporting LIN-bus)
IIC21
• 64-pin products
Unit Channel Used as CSI Used as UART
Used as Simplified I
2
C
0 CSI00 IIC00
1 CSI01
UART0
IIC01
2 CSI10 IIC10
0
3 CSI11
UART1
IIC11
0 CSI20 IIC20 1
1 CSI21
UART2 (supporting LIN-bus)
IIC21
When “UART0” is used for channels 0 and 1 of the unit 0, CSI00 and CSI01 cannot be used, but CSI10, UART1, or
IIC10 can be used.
Caution Most of the following descriptions in this chapter use the units and channels of the 64-pin products
as an example.