VersaLogic EBX-22 Reference Manual page 59

Table 26 shows the addresses of all analog input registers.
ADC Data Register
ADCx (Read Only)
D15
–
D7
AD7
The ADCx register is a 16-bit read register containing 12 bits of data from A/D conversion
results. The four most significant bits are always 0.
Bit Mnemonic
D15-D0 AD
ADC State Machine Code Example
The following code example illustrates the procedure for reading analog voltage from channel 0:
MOV
IN
EBX-22 Reference Manual
Table 26: Analog Input 16-bit Register Addresses
Channel Base Address
Analog Input 0
Analog Input 1
Analog Input 2
Analog Input 3
Analog Input 4
Analog Input 5
Analog Input 6
Analog Input 7
D14 D13 D12
– – –
D6 D5 D4
AD6 AD5 AD4
Table 27: ADCx Bit Assignments
Description
A/D Input Data – These bits contain the 12-bit conversion results. Bits D15
through D12 are always 0.
DX,1C0 ;Point to ADC0 register
AX,DX ;Read ADC0 register
Register
1C0h ADC0
1C2h ADC1
1C4h ADC2
1C6h ADC3
1C8h ADC4
1CAh ADC5
1CCh ADC6
1CEh ADC7
D11 D10
AD11 AD10
D3 D2
AD3 AD2
Interfaces and Connectors
D9 D8
AD9 AD8
D1 D0
AD1 AD0
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