HP 9112 3.2A/D Data Registers

I/O Address	Read		Write
Base + 0	Counter 0		Counter 0
Base + 4	Counter 1		Counter 1
Base + 8	Counter 2		Counter 2
Base + C	-------------		8254	Counter
			Control
Base + 10	A/D Data Reg.		CH1	D/A	Data
			Reg.
Base + 14	-------------		CH2	D/A	Data
			Reg.
Base + 18	A/D	Status	A/D Control Reg.
	Reg.
Base + 1C	Digital IN Reg.		Digital OUT Reg.
Base + 20	-------------		Software Trigger
	Table 3.1 I/O Address

3.2A/D Data Registers

The PCI-9112 provides 16 single-ended or 8 differential A/D input
channels, the digital data will store in the A/D data registers. The 12 bits
A/D data is put into 32 bits registers.
Address		: BASE + 10
Attribute		: read only
Data Format:
	Bit		7	6
	BA	A		A
	SE+	D		D
	10	3		2
	BA	A		A
	SE+	D		D
	11	1		1
		1		0
	BA	-		-		-		-	-		-
	SE+	-		-		-		-	-		-
	12	-		-		-		-	-		-
	BA	-		-		-		-	-		-
	SE+	-		-		-		-	-		-
	13	-		-		-		-	-		-
	AD11 .. AD0	:		Analog	to		digital	data.	AD11	is the Most
Significant Bit (MSB). AD0 is the Least Significant Bit (LSB).
CH3 ~ CH0 : A/D channel number from which the data is derived.
--- :		Don‘t care

20 ∙ Registers Format