UPD70F3212 Datasheet, PDF (468/861 Pages) NEC – 32-Bit Single-Chip Microcontrollers

CHAPTER 17 CLOCKED SERIAL INTERFACE 0 (CSI0)
17.2 Configuration
CSI0n is controlled via the CSIM0n register.
(1) Clocked serial interface mode register 0n (CSIM0n)
The CSIM0n register is an 8-bit register that specifies the operation of CSI0n.
(2) Clocked serial interface clock selection register n (CSICn)
The CSICn register is an 8-bit register that controls the CSI0n serial transfer operation.
(3) Serial I/O shift register 0n (SIO0n)
The SIO0n register is a 16-bit shift register that converts parallel data into serial data.
The SIO0n 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 accessing the buffer register.
(4) Serial I/O shift register 0nL (SIO0nL)
The SIO0nL register is an 8-bit shift register that converts parallel data into serial data.
The SIO0nL 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 receive buffer register n (SIRBn)
The SIRBn register is a 16-bit buffer register that stores receive data.
(6) Clocked serial interface receive buffer register nL (SIRBnL)
The SIRBnL register is an 8-bit buffer register that stores receive data.
(7) Clocked serial interface read-only receive buffer register n (SIRBEn)
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 receive buffer register nL (SIRBEnL)
The SIRBEnL register is an 8-bit buffer register that stores receive data.
The SIRBEnL register is the same as the SIRBnL register. It is used to read the contents of the SIRBnL
register.
(9) Clocked serial interface transmit buffer register n (SOTBn)
The SOTBn register is a 16-bit buffer register that stores transmit data.
(10) Clocked serial interface transmit buffer register nL (SOTBLnL)
The SOTBnL register is an 8-bit buffer register that stores transmit data.
(11) Clocked serial interface initial transmit buffer register n (SOTBFn)
The SOTBFn register is a 16-bit buffer register that stores the initial transmit data in the continuous transfer
mode.
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User’s Manual U16890EJ1V0UD