Sony Ericsson VPL-PX30 User Manual
Page 9
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5
VPL-PX20/PX30
VPL-VW10HT
5
5
5
5
5
Data Size 3
Note: Error when 80 to FF hex codes are included.
6
6
6
6
6
Data
Bn = B16
+ 1
Bm = B16
+ Total Data Length
7
7
7
7
7
Check SUM
XOR is the exclusive OR.
It is as follows when calculated by 1 bit.
Taking A XOR B = C;
A
B
C
0
0
0
1
0
1
0
1
1
1
1
0
<Example of Calculation>
When 0XA5 (165) and 0XA5 (165) are calculated by XOR;
A5
10100101
(165)
A5
10100101
(165)
Answer
00000000
(0)
When 0XA5 (165) and 0X5A (90) are calculated by XOR;
Answer
A5
10100101
(165)
5A
01011010
(90)
Answer
11111111
(255)
8
8
8
8
8
End Condition
B16
Data Length 3
00 7F
Size of
6
Bn - Bm Data
XX
No Data in some cases
Bm
+
1
Check Sum
XX
Check sum of Data from
2
to
6
(Calculate the XOR of the Data from
2
to
6
)
Bm
+
2
END Code
5A
Indicates the last packet
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