ZyXEL Communications Omni TA128 User Manual
Page 144
132
O
O
note: The values used in the example below differ from the actual
values in the S-register and are used for demonstration purposes
only.
Read the value from S38 using ATS38?
Convert it to binary, using the following weight table:
Bit
Binary value
Decimal value Hexadecimal value
0
00000001
1
$01
1
00000010
2
$02
2
00000100
4
$04
3
00001000
8
$08
4
00010000
16
$10
5
00100000
32
$20
6
01000000
64
$40
7
10000000
128
$80
To set bit 3 to 1 (binary), do a logic OR operation with the value.
Operation
Example-1
Example-2
Binary
Dec. Hex Binary
Dec.
Hex.
10001000
136
$88
01000000
64
$40
OR
00001000
8
$08
00001000
8
$08
10001000
136
$88
01001000
72
$48
To set bit 3 to 0 (binary), you must invert the value using a logic
NOT operation and then do an logic AND operation.
NOT
00001000 8
$08
00001000 8
$08
11110111 247
$F7 11110111 247
$F7
AND
10001000 136
$88
01000000 64
$40
10000000 128
$80
01000000 64
$40
Finally, using the result decimal value, issue an ATS38=n to set
the register.