User`s guide

22 • Registers
3.3 A/D Data Registers
The PCI-9111 A/D data is stored in the FIFO after conversion. The data can
be transferred to the host memory by software control only. The register
format for the 12-bits PCI-9111DG and 16-bits PCI-9111HR is different and is
not compatible. For the 12-bit PCI-9111 data, the 4 LSB are used to store the
channel number in which the AD data is stored.
Address: BASE + 0h
Attribute: read only
Data Format:
For 12-bits PCI-9111DG
Bit 7 6 5 4 3 2 1 0
BASE+0h AD3 AD2 AD1 AD0 CH3 CH2 CH1 CH0
BASE+1h AD11 AD10 AD9 AD8 AD7 AD6 AD5 AD4
for 16-bits PCI-9111HR
Bit 7 6 5 4 3 2 1 0
BASE+0h AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
BASE+1h AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8
AD15~AD0: Analog to digital data. AD11 is the Most Significant Bit (MSB) for
the PCI-9111DG while AD15 is the MSB of PCI-9111HR. AD0 is
the Least Significant Bit (LSB).
CH3~CH0: A/D channel number from which the data is derived.