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Xtreme I/O Express ADC-DAC
Users Guide
Document: CTIM-00435
Revision: 0.08
Page 16 of 47
Connect Tech Inc. 800-426-8979 | 519-836-1291
Date: 2016-11-18
Register Details
CONTROL_CONFIG (ADC# Offset 0x0000 : Read/Write)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved / Future Use
S
T
O
P
-
R
S
T
D
I
V
S
T
O
R
S
C
H
0
S
C
H
1
S
C
H
2
S
C
H
3
S
C
H
4
S
C
H
5
S
C
H
6
S
C
H
7
This register contains several control bits/flags
STOP
0=normal operation, 1=stop sampling
RST
0=normal operation, 1=reset ICs and regs
DIV
0=maximum rate, 1=divide
STOR
1=store samples in memory, 0=don't store
SCHx
Enable Sample of CHANx (0..7)
INPUT_RANGE_SELECT (ADC# Offset 0x0010 : Read/Write)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
CH7
Range
CH6
Range
CH5
Range
CH4
Range
CH3
Range
CH2
Range
CH1
Range
CH0
Range
This register contains all of the channel input range values which are described below.
CHx
Range [2:0]
Postive
Full Scale (V)
Negative
Full Scale (V)
Full-Scale
Range (V)
LSB (µV)
000
10.24
-10.24
20.48
312.5
001
5.12
-5.12
10.24
156.25
010
2.56
-2.56
5.12
78.125
101
10.24
0
10.24
156.25
110
5.12
0
5.12
78.125
CHx_LAST_SAMPLE (Offset 0x0014 : Read Only)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CHx 16-bit CODE
This register contains the last sampled 16-bit code for the specific channel. Bit-15 is the MSB of the
CODE and Bit-0 is the LSB for the CODE.
All samples are in a binary format for both bipolar and unipolar input ranges. The full-scale range
(FSR) for each input signal is equal to the difference between the positive full-scale (PFS) input
voltage and the negative full-scale (NFS) input voltage. The LSB size is equal to FSR / 65536 because
the resolution of the ADC is 16 bits.