BenQ PB6100 Service Manual page 63

e. Packet to Target (BenQ PB6XXX) structure (Table 3)
B. Send Command
1. Introduction
Command packets consist of "Header" and "Payload". The Packet Header is consistent for all packets. The Packet
Payload type and content varies based on the type of packet sent. The entire packet size is variable, being the sum of the
fixed-size Packet Header and variable-sized Packet Payload.
Packet Header (fixed size)
Figure 2 Packet Format
Packet Header Format
All Packets use the same Packet Header format illustrated
Byte 0
1
Magic Number
0xBE 0xEF
Byte0
Byte1
Byte2
Packet
Byte3
Header
Byte4
Byte5
Byte6
Byte7
Byte8
Packet
Byte9
Payload
Byte10
Byte11
Table 3
2
Type
type
Figure 3 Packet Format
0xBE
0xEF
0x01
0x05
0x00
0xA9
0xC6
0x00
0x00
0x00
0x00
0x00
Packet Payload (variable size)
Figure 3.
3 4
Packet Payload Size
size_lo size_hi
Magic
Number
Packet Type
Packet size (Low)
Packet size (High)
CRC (Low)
CRC (High)
System Info Type
Version Number
Object ID
Level
5
CRC
crc_lo crc_hi
6
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