ML610Q174 User’s ManualChapter 11 Synchronous Serial PortFEUL610Q174-01 11-111. Synchronous Serial Port11.1 OverviewThis LSI includes two channels of the 8/16-bit synchronous serial port (SSIO) and can also be used to control thedevice incorporated with the SPI interface by using one GPIO as the chip enable pin.For the input clock, see Chapter 6, “Clock Generation Circuit”.When the synchronous serial port is used, the tertiary functions of port 4 or the tertiary functions of port 5 or thetertiary functions of port F must be set. For the tertiary functions of port 4, see Chapter 18, “Port 4”. For the tertiaryfunctions of port 5, see Chapter 19, “Port 5”. For the tertiary functions of port F, see Chapter 24, “Port F”.The synchronous serial port (SSIO0) operates only when the DSIO0 bit of the block control register 2 (BLKCON2) is“0”. When the DSIO0 bit is “1”, every function of SSIO0 is in a reset stateThe synchronous serial port (SSIO1) operates only when the DSIO1 bit of the block control register 2 (BLKCON2) is“0”. When the DSIO1 bit is “1”, every function of SSIO1 is in a reset stateFor the block control registers, see Chapter 4, “MCU Control Function”.11.1.1 Features• Master or slave selectable• MSB first or LSB first selectable• 8-bit length or 16-bit length selectable fro the data length11.1.2 ConfigurationFigure 11-1 shows the configuration of the synchronous serial port.SIO0BUFL: Serial port transmit/receive buffer LSIO0BUFH: Serial port transmit/receive buffer HSIO0CON: Serial port control registerSIO0MOD0: Serial port mode register 0SIO0MOD1: Serial port mode register 1Shift register8 bits/16 bitsData busTransmit registerSIO0TRH, LControlcircuitSIO0CONSIO0MOD0SIO0MOD1P41/SCK0P45/SCK0PF1/SCK0Receive registerSIO0RCH, LLSB/MSB controlSIO0BUFH, SIO0BUFLHSCLKLSCLKP40/SIN0P44/SIN0PF0/SIN0P41/SCK0P45/SCK0PF1/SCK0P42/SOUT0P46/SOUT0PF2/SOUT0SIO0INT
