SCR_RXBCUSEDK
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
sec_reg_value |= (SCR_RXBCUSEDK | SCR_TXBCUSEDK);
reg_scr &= ~(SCR_RXBCUSEDK|SCR_TXBCUSEDK|SCR_RxUseDK|SCR_TxUseDK);