User`s guide

26  Registers Format
3.8 A/D Status Register
Address : BASE + 8
Attribute : read only
Data Format:
Bit 7 6 5 4 3 2 1 0
AD_BUSY FF-FF FF_HF FF_EF CNH CN2 CN1 CN0
 CNH and CN2~CN0
These bits are used to feedback the
channel number to be selected.
When the ACL-8316/12 is set to be differential mode. CNH will be 1
always. When the A/D mode is in auto scan mode, the channel number
will be increased by one automatically.
 FF_EF
0: FIFO is empty
1: FIFO is not empty
 FF_HF
0: FIFO is half full
1: FIFO is not half full
 FF_FF
0: FIFO is full
1: FIFO is not full
Above 3 bits are FIFO relative flags which are used to indicate the FIFO
status. These status can be used to read A/D FIFO data by software
polling without the help of hardware.
 AD_BUSY
0: A/D converter is busy, i.e. A/D conversion is not completed
1: A/D converter is not busy, i.e. A/D conversion is completed