PROC_BOOT_CFG_FLAG_R5_BTCM_EN
set_cfg |= PROC_BOOT_CFG_FLAG_R5_BTCM_EN;
clr_cfg |= PROC_BOOT_CFG_FLAG_R5_BTCM_EN;
btcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_BTCM_EN ? 1 : 0;