I/O Port Address
The I/O port address are &H278-27F or &H2F8-2FF selectable:
278/2F8 : Output A/D channel number. (low nibble)
279/2F9 : Input A/D low byte data. (8 bits)
27A
/2FA : Input A/D high byte data. (low nibble)
27B/2FB : Clear A/D register.
27C/2FC : A/D conversion loop. (low)
27D/2FD : A/D conversion loop. (high)
27E/2FE : Output D/A low byte data. (8 bits)
27F/2FF : Output D/A high byte da ta. (low nibble)

Jumper Settong
1. I/O Port Address
JP1 is used to select port address.
12-Bit A/D-D/A aadapter
1,2 short
2,3 short
Input A/D low byte data (8 bit)
H278 H2F8
Input A/D high byte data (8 bit) H279 H2F8
Input A/D high byte data (8 bit) H27A H2FA
Clear A/D Register
H27B H2FB
A/D conversion loop (low)
H27C H2FC
A/D conversion loop (high)
H27D H2FD
Output D/A low byte data (8 bit)
H27E H2FE
Output D/A high byte data (low nibble)
H27F
H2FF

2.Output Voltage Setting
JP2 is used to select voltage setting

3.Input SettingsInput Settings
Type Connector Pin Assignment
Pin
Function
Pin
Function
1
GND
14
GND
2
D/A OUT
15
-5V
3
+5V
16
GND
4
GND
17
A/D Channel 15
5
A/D Channel 0 18
A/D Channel 14
6
A/D Channel 1 19
A/D Channel 13
7
A/D Channel 2 20
A/D Channel 12
8
A/D Channel 3 21
A/D Channel 11
9
A/D Channel 4 22
A/D Channel 10
10
A/D Channel 5 23
A/D Channel 9
11
A/D Channel 6 24
A/D Channel 8
12
A/D Channel 7 25
-12V
13
+12V