Allwinner A20 - Page 600

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 600 / 812
Offset: 0x10
Register Name: SPI_INT_STA
Default Value: 0x0000_1B00
Bit
Read/Write
Default
Description
0: TXFIFO holds more than half words
1: TXFIFO holds half or fewer words
8
R/W
1
TE
TXFIFO Empty
This bit is set if the TXFIFO is empty. Writing 1 to this bit clears
it.
0: TXFIFO contains one or more words.
1: TXFIFO is empty
7
/
/
/
6
R/W
0
RU
RXFIFO Underrun
When set, this bit indicates that RXFIFO has underrun. Writing
1 to this bit clears it.
5
R/W
0
RO
RXFIFO Overflow
When set, this bit indicates that RXFIFO has overflowed.
Writing 1 to this bit clears it.
0: RXFIFO is available.
1: RXFIFO has overflowed.
4
R/W
0
RF34
RXFIFO 3/4 Full
This bit is set when the RXFIFO is 3/4 full . Writing 1 to this bit
clears it.
0: Not 3/4 Full
1: 3/4 Full
3
R/W
0
RF14
RXFIFO 1/4 Full
This bit is set when the RXFIFO is 1/4 full . Writing 1 to this bit
clears it.
0: Not 1/4 Full
1: 1/4 Full
2
R/W
0
RF
RXFIFO Full
This bit is set when the RXFIFO is full . Writing 1 to this bit
clears it.
0: Not Full