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SN8F27E60 Series 8-Bit Flash Micro-Controller with Embedded ICE and ISP The SIO supports 8-mode format controlled by MLSB, CPOL and CPHA bits. The edge direction is “Data Transfer Edge”. When setting rising edge that means to receive and transmit one bit data at SCK rising edge, and data transition is at SCK falling edge. When setting falling edge, that means to receive and transmit one bit data at SCK falling edge, and data transition is at SCK rising edge. “CPHA” is the clock phase bit controls the phase of the clock on which data is sampled. When CPHA=1, the SCK first nd st edge is for data transition, and receive and transmit data is at SCK 2 edge. When CPHA=0, the 1 bit is fixed already, and the SCK first edge is to receive and transmit data. The SIO data transfer timing as following figure: M L S B 0 C P O L 0 C P H A Diagrams 1 0 1 0 1 0 1 1 0 1 bit4 bit3 bit2 bit1 bit0 SCK idle status = High. The transfer first bit = MSB. SCK data transfer edge = Rising edge. bit6 bit5 bit4 bit3 bit2 bit1 Bit7 SCK idle status = Low. The transfer first bit = MSB. SCK data transfer edge = Rising edge. SCK idle status = High. The transfer first bit = MSB. SCK data transfer edge = Falling edge. SCK idle status = Low. The transfer first bit = LSB. SCK data transfer edge = Falling edge. Bit7 SCK idle status = High. The transfer first bit = LSB. SCK data transfer edge = Rising edge. bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 Next data bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 Next data 0 1 bit1 bit2 bit3 bit4 bit5 bit6 1 bit0 1 bit5 0 bit0 1 bit6 1 bit7 0 bit0 SCK idle status = Low. The transfer first bit = MSB. SCK data transfer edge = Falling edge. 1 bit7 0 Description bit1 bit2 bit3 bit4 bit5 bit6 0 bit0 bit1 bit2 bit3 bit4 bit5 bit6 Bit7 Next data bit0 bit1 bit2 bit3 bit4 bit5 bit6 Bit7 Next data 0 SCK idle status = Low. The transfer first bit = LSB. SCK data transfer edge = Rising edge. SCK idle status = High. The transfer first bit = LSB. SCK data transfer edge = Falling edge. SIO Data Transfer Timing SONiX TECHNOLOGY CO., LTD Page 140 Version 1.4
