I/O Port Address - Old Address (26O)
The I/O port address are &H170-17F or &H160-16F selectable:
1.
 170/160 : Output A/D channel number. (low nibble)
2.
 171/161 : Clear A/D register.
3.
 172/162 : Input A/D low byte data. (8 bits)
4.
 173/163 : Input A/D high byte data. (low nibble)
5.
 174/164 : Output D/A low byte data. (channel 1/8 bits)
6.
 175/165 : Output D/A high byte data. (channel 1/low nibble)
7.
 176/166 : Output D/A low byte data. (channel 2/8 bits)
8.
 177/167 : Output D/A high byte data. (channel 2/low nibble)
9.
 17A/16A A/D conversion loop. (low)
10.
 17C/16C : A/D conversion loop. (high)

Jumper Setting
1. I/O Port Address
JP8 is used to select I/O port address
JP8
 Address
short
 H170 - 17F
open H160 - 16F

PORT CASE 1 CASE 2
Port 0 H170
 H160
Port 1
 H171 H161
Port 2 H172 H162
Port 3 H173 H163
Port 4 H174 H164
Port 5 H175 H165
Port 6 H176 H166
Port 7 H177 H167
Port 8 H17A H16A
Port 9 H17C H16C

 
 

I/O Port Address - New Address(26N)
The I/O port address are &H270-27F or &H260-26F selectable:
1.
 270/260 : Output A/D channel number. (low nibble)
2.
 271/261 : Clear A/D register.
3.
 272/262 : Input A/D low byte data. (8 bits)
4.
 173/163 : Input A/D high byte data. (low nibble)
5.
 274/264 : Output D/A low byte data. (channel 1/8 bits)
6.
 275/265 : Output D/A high byte data. (channel 1/low nibble)
7.
 276/266 : Output D/A low byte data. (channel 2/8 bits)
8.
 277/267 : Output D/A high byte data. (channel 2/low nibble)
9.
 27A/26A A/D conversion loop. (low)
10.
 27C/26C : A/D conversion loop. (high)

Jumper Setting
JP8
 Address
short
 &H270 - 27F
open &H260 - 26F

Case 1: &H270-27F(default seting)

Case 2: &H260 - 26F

The I/O address mapping are described in following:
PORT CASE 1 CASE 2
Port 0 270
 260
Port 1
 271 261
Port 2 272 262
Port 3 273 263
Port 4 274 264
Port 5 275 265
Port 6 276 266
Port 7 277 267
Port 8 27A 26A
Port 9 27C 26C


2. Single-ended or Differential Mode Selection
JP7 is used to select single-ended or differential mode.

3. A/D Input Voltage and Scalar
JP3 is used to select unipolar or bipolar fo A/D input voltage, and JP6 is used to select voltage scalar of A/D input voltage.
JP3-1 JP3-2 polar
short open bipolar
open short unipolar

JP6-1
 JP6-2
 JP6-3
 scalar
short
 open
 open
 2.5V
open
 short
 open
 5V
open
 open
 short
 10V

4. D/A Channel 1 Output Voltage and Scalar

JP1 is used to select unipolar or bipolar of D/A channel 1 output voltage, and JP5 is used to select voltage scalar of  D/A channel 1 output voltage.
JP1-1
 JP1-2
 polar
short
 open
 bipolar
open
 short
 unipolar

JP5-1
 JP5-2
 JP5-3
 scalar
short open open 2.5V
open short open 5V
open open short 10V

5. D/A Channel 2 Output Voltage and Scalar

JP2 is used to select unipolar or bipolar of D/A channel 2 output voltage, and JP4 is used to select voltage scalar of  D/A channel 2 output voltage.
JP2-1
 JP2-2
 polar
short
 open
 bipolar
open
 short
 unipolar

JP4-1
 JP4-2
 JP4-3
 scalar
short open open 2.5V
open short open 5V
open open short 10V


NOTE
1.
 The scalar range is from negative voltage to positive voltage when bipolar is selected. Otherwise, the scalar range is from 0 to positive voltage.
2.
 The full scalar voltage is the higest voltage dependent on your scalar range selection.
3.
 Default settings are unipolar and scalar range is 10V.
In the following, we show some jumper setting examples.
1. select A/D unipolar and 0V to 10V scalar

2. select A/D bipolar and -5V to 5V scalar.

3. select D/A channel 1 unipolsr and 0V to 5V scalar.

4. select D/A channel 2 bipolar and -2.5V to 2.5V scalar.


Type Connector Pin Assignment

A. Single-ended Mode (default setting)
Pin
 Function
 PIn
 Function
1
 +12V 14
 -12V
2
 D/A CH2 OUT 15
 D/A CH1 OUT
3
 GND 16
 A/D CH15
4
 A/D CH14 17
 A/D CH13
5
 A/D CH12 18
 A/D CH11
6
 A/D CH10 19
 A/D CH9
7
 A/D CH8 20
 A/D CH7
8
 A/D CH6 21
 A/D CH5
9
 A/D CH4 22
 A/D CH3
10
 A/D CH2 23
 A/D CH1
11
 A/D CH0 24
 GND
12
 GND 25
 -5V
13
 		+5V 26

B. Differential Mode
Pin
 Function
 PIn
 Function
1
 +12V 14
 -12V
2
 D/A CH2 OUT 15
 D/A CH1 OUT
3
 GND 16
 A/D CH7-
4
 A/D CH7+ 17
 A/D CH6-
5
 A/D CH6+ 18
 A/D CH5-
6
 A/D CH5+ 19
 A/D CH4-
7
 A/D CH4+ 20
 A/D CH3-
8
 A/D CH3+ 21
 A/D CH2-
9
 A/D CH2+ 22
 A/D CH1-
10

A/D CH1+

 23
 A/D CH0-
11
 A/D CH0+ 24
 GND
12
 GND 25
 -5V
13
 +5V

VR Adjustment
VR1, VR2, and VR3 are used to adjust reference voltage of A/D and D/A channel. To screw VR clockwise, the reference voltage will be increased, otherwise to screw VR counterclockwise, the reference voltage will be decreased.
VR number port
VR3 A/D channel
VR1 D/A channel 2
VR2 D/A channel 1