The data buffer status is defined in the following interrupt status register and status register:
- Interrupt status registers (see MMC_STAT):
- MMC_STAT[29] BADA Bad
access to data space
- MMC_STAT[5] BRR Buffer
read ready
- MMC_STAT[4] BWR Buffer
write ready
- Status registers (see MMC_PSTATE):
- MMC_PSTATE[11] BRE Buffer
read enable
- MMC_PSTATE[10] BWE Buffer
write enable