Holtek HT32F12345 User Manual page 579

32-Bit Arm ® Cortex ® -M3 MCU
HT32F12345
Bits Field
[23:20] BLSTA
[19] BURAW
[18] BORAW
[11] BERAW
[10] BFRAW
[9] RTASTA
[8] WTASTA
[2] DLASTA
[1] CIDSTA
[0] CICSTA
Rev. 1.10
Descriptions
Buffer Level State
0000: Buffer contains no data
0001: Buffer contains 1 × 32-bit data
...
1000: Buffer contains 8 × 32-bit data
Others: Reserved
Buffer Underflow Raw State
0: Buffer not underflow
1: Buffer underflow
If this status bit is set to 1, it indicates that the data buffer is underflow. A software
reset for DPSM can clear this bit.
Buffer Overflow Raw State
0: Buffer not overflow
1: Buffer overflow
If this status bit is set to 1, it indicates that the data buffer is overflow. A software
reset for DPSM can clear this bit.
Buffer Empty Raw State
0: Buffer not empty
1: Buffer empty
If this status bit is set to 1, it indicates that the data buffer is empty. In this case, any
read operation will set the Buffer Underflow State.
Buffer Full Raw State
0: Buffer not full
1: Buffer full
If this status bit is set to 1, it indicates that the data buffer is full. In this case, any
write operation will set the Buffer Overflow State.
Read Transfer Active State
0: No valid data
1: Transferring data
This status is used for detecting completion of a read transfer.
Write Transfer Active State
0: No valid data
1: Transferring data
This status indicates that a write transfer is active. If this bit is 0, it means no valid
written data exists in the Host Controller.
DAT Line Active State
0: DAT line inactive
1: DAT line active
This bit indicates whether one of the DAT lines on SD Bus is in use.
Command Inhibit (DAT) State
0: Can issue a command which uses the DAT line
1: Cannot issue a command which uses the DAT line
This status bit is generated if either the DAT Line Active or the Read Transfer Active
is set to 1. If this bit is 0, it indicates that the Host Controller can issue the next SD
Command.
Command Inhibit (CMD) State
0: Can issue a command using only the CMD line
1: Cannot issue command
If this bit is 0, it indicates that the CMD line is not in use and the Host Controller can
issue an SD Command using the CMD line.
579 of 590 November 28, 2018