Specifications

Chapter 4 API Reference Installation and Operation Manual
4-2 Management Message Format MiRIC-E1, MiRIC-T1 Ver. 1.5
4.3 Management Message Format
Two types of I
2
C message structures are transferred from host to MiRIC and vice
versa see
Figure 4-2.
Multi data byte I
2
C Message
Start Control
R/W
Slave address Data
Byte 1 Byte 2 Byte 3
Data
Byte 8
Length of
Parameter
Parameter
Byte 3 Byte 4 Byte 5Byte 2Byte 1
Index MSB Index LSB
R/W
Management Message
Figure 4-2. Management Message Encapsulated in the Multi-Data byte I
2
C Message
The management message is encapsulated in the in Data bytes of the I
2
C message
(bytes 3-8). The slave address points to the reserved area in page 0 of the
identification memory (addresses 0x60 to 0x7F).
The data bytes of the I
2
C message carry the message from the host to the MiRIC
device.
The host message structure may be a write message such as a configuration
message or a read message like status. Messages are sent to the MiRIC in the
format shown as described in
Figure 4-3.
Index
2 bytes
Read/Write
1 byte
Length of Parameter
1 byte
Data
Reserved Area
128 0x80
0xFF
255
Figure 4-3. Message Format
Index: written into addresses 0x80 and 0x81 – The Index bytes determine the
command code of the host message.
Read/Write: written into address 0x82 – This byte determines if the command is a
read or write operation.