LG Electronics 120S user manual Communication Functions

Chapter 8 Communication Functions

④Complement setting : Complement calculation as below example> 1’s and 2’s Complements of D3

bit 7							bit 0
1	1	0	1	0	0	1	1
bit 7							bit 0
0	0	1	0	1	1	0	0
bit 7							bit 0
0	0	1	0	1	1	0	1

⑤Mask setting : Masking method is as below

bit 7							bit 0
1	1	0	1	0	0	1	1
bit 7							bit 0
1	1	1	1	1	1	1	1
bit 7							bit 0
1	1	0	1	0	0	1	1
bit 7							bit 0
1	1	0	1	0	0	1	1
bit 7							bit 0
0	0	1	0	1	1	0	0

= h D3(sum check value)

1’ complement = h 2C(the last sum check value)

2’ complement = 1’ complement + 1 = h 2D(the last sum check

l)

=h D3 (sum check value)

=hFF (masking value)

AND masking = hD3

OR masking = hFF

Exclusive OR masking = h2C

8-46