Specifications
Appendix C I2C Interface Management Installation and Operation Manual
C-2 Serial Link Message Format MiTOP-E1/T1 Ver. 1.0
C.2 Serial Link Message Format
This message format defines the structure used to read the ID table parameters.
The process of reading the ID table parameters complies with the MSA document
and consists of two main steps:
1. Write message from the host:
Includes I
2
C Control and Write bits in the first byte.
The Slave Address byte includes 0xA0h.
The Data byte includes 0x00, the first address to be read.
2. Read message from the host:
Includes I
2
C Control and Read bits in the first byte.
MiTOP-E1/T1 replies with acknowledgement (zero).
The Data byte is clocked out from MiTOP-E1/T1 to the host.
The host acknowledges each byte or replies with STOP to terminate the
process.
Management Message Format
Two types of I
2
C message structures are transferred from the host to MiTOP-
E1/T1 and vice versa see
Figure
C-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
C-2. Management Message Encapsulated in the Multi-Data byte I
2
C Message
The management message is encapsulated in the 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 0x80 to 0x9E).
The data bytes of the I
2
C message carry the message from the host to the
MiTOP-E1/T1 device.
Control
Start
Data
R/W
Data