Nexus Machines Ltd reserves the right to alter or withdraw the product specification and characteristics without prior notice at any time in line
with product development. Nexus Machines Ltd sole and exclusive warranty is that stated in the warranty article of the conditions of sale.
Although every effort is made to ensure this data is accurate no liability is accepted for errors or omissions that may affect the end product.
Week0802
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Register Address Map
Register
No operation
Digit 0
Digit 1
Digit 2
Digit 3
Digit 4
Digit 5
Digit 6
Digit 7
Decode mode
Intensity
Scan limit
Shutdown
Display test
Display command Register Functions
D15-D12
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Hex code
X0
X1
X2
X3
X4
X5
X6
X7
X8
X9
XA
XB
XC
XF
Shutdown register Format (address Xch)
Mode
Address
Shutdown
Mode
Normal
Operation
D7
X
D6
X
D5
X
D4
X
D3
X
D2
X
D1
X
D0
0
XCh
XCh
X
X
X
X
X
X
X
1
Decode Mode Register: Setting this register sets BCD code (0-9,E,H,L,P and -) or no decode
operation for each digit. Each bit in the register corresponds to one digit. A logic 1 selects Code
B decoding whereas a logic 0 enables non decode mode. In decode mode bits 0-3 correspond to
the BCD data for the digit and bit D7 is the decimal point. In non decode mode data bits 0 to 7
correspond to the segment lines as outlines in the table below.
Decode Mode register examples
Decode Mode
D7
D6
D5
D4
D3
D2
D1
D0
Hex
code
00
01
No decode for digits 7-0
Code B decode for digit 0
and no decode for digits 7-1
Code B decode for digits 3-0
and no decode for digits 7-4
Code B decode for digits 7-0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
1
1
1
0Fh
1
1
1
1
1
1
1
1
FFh