Hercules III User Manual Rev A.2
www.diamondsystems.com
Page
51
D/A MSB: Base+7 (Write)
Bit:
7
6
5
4
3
2
1
0
Name:
DA15-DA8
DA15-DA8 D/A MSB data.
FIFO Threshold LSB: Base+8 (Read/Write)
Bit:
7
6
5
4
3
2
1
0
Name:
FT7-FT0
FT7-FT0 FIFO threshold value LSB.
FIFO Threshold MSB: Base+9 (Read/Write)
Bit:
7
6
5
4
3
2
1
0
Name:
-
-
-
-
-
FT10-FT8
FT10-FT8 FIFO threshold value MSB.
When the FIFO depth is greater than or equal to the FIFO threshold, TF (threshold flag) = 1 and an A/D
interrupt request will be generated, if FIFOEN = 1 and ADINTE = 1.
The FIFO size is 2048 samples. The threshold value may be anywhere from 1 to 2047 samples. In
most cases, the threshold does not need to be larger than one-half the FIFO size, or 1024 samples.
On power-up or system reset, the FIFO threshold is set to 1024 samples.
FIFO Depth LSB: Base+10 (Read)
Bit:
7
6
5
4
3
2
1
0
Name:
FD7-FD0
FD7-FD0 Current FIFO depth LSB.