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Chapter 13
Serial Interface Function
Preliminary User’s Manual U15839EE1V0UM00
13.3.2 Configuration
CSI0n is controlled via the clocked serial interface mode register (CSIMn) (n = 0 to 2).
Transmission/reception of data is performed with reading SIOn register (n = 0 to 2).
(1)
Clocked serial interface mode registers (CSIM0 to CSIM2)
The CSIMn register is an 8-bit register that specifies the operation of CSI0n.
(2)
Clocked serial interface clock selection registers (CSIC0 to CSIC2)
The CSICn register is an 8-bit register that controls the CSI0n serial transfer operation.
(3)
Serial I/O shift registers (SIO0 to SIO2)
The SIOn register is a 16-bit shift register that converts parallel data into serial data.
The SIOn register is used for both transmission and reception.
Data is shifted in (reception) and shifted out (transmission) from the MSB or LSB side.
The actual transmission/reception operations are started up by access of the buffer register.
(4)
Serial I/O shift registers Low (SIOL0 to SIOL2)
The SIOLn register is an 8-bit shift register that converts parallel data into serial data.
The SIOLn register is used for both transmission and reception.
Data is shifted in (reception) and shifted out (transmission) from the MSB or LSB side.
The actual transmission/reception operations are started up by access of the buffer register.
(5)
Clocked serial interface reception buffer registers (SIRB0 to SIRB2)
The SIRBn register is a 16-bit buffer register that stores receive data.
(6)
Clocked serial interface reception buffer registers Low (SIRBL0 to SIRBL2)
The SIRBLn register is an 8-bit buffer register that stores receive data.
(7)
Clocked serial interface read-only reception buffer registers (SIRBE0 to SIRBE2)
The SIRBEn register is a 16-bit buffer register that stores receive data.
The SIRBEn register is the same as the SIRBn register. It is used to read the contents of the
SIRBn register.
(8)
Clocked serial interface read-only reception buffer registers Low (SIRBEL0 to SIRBEL2)
The SIRBELn register is an 8-bit buffer register that stores receive data.
The SIRBELn register is the same as the lower bytes of the SIRBn register. It is used to read the
contents of the SIRBLn register.
(9)
Clocked serial interface transmission buffer registers (SOTB0 to SOTB2)
The SOTBn register is a 16-bit buffer register that stores transmit data.
(10) Clocked serial interface transmission buffer registers Low (SOTBL0 to SOTBL2)
The SOTBLn register is an 8-bit buffer register that stores transmit data.
(11) Clocked serial interface initial transmission buffer registers (SOTBF0 to SOTBF2)
The SOTBFn register is a 16-bit buffer register that stores the initial transmit data in the repeat
transfer mode.
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