Serial interface 0 and 1 AUX Auxiliary register 91h BRS P4CC P4SPI P4UR1 P4IIC P0KBI - DPS 00H ... SPI Description Direct Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 RESET SPI function AUX Auxiliary register 91h BRS P4CC P4SPI P4UR 1 SPIC1 SPISS ...