PCC_SPI_IR
pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_WREN);
pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_RDSR);
pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_WRITE(addr));
pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_RDSR);
pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_WRDI);