Filter
Top Products
Section 21 IEBus
TM
Controller
Page 1136 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
21.4 Data Format
21.4.1 Transmission Format
Figure 21.6 shows the relationship between the transfer format and each register during the IEBus
data transmission.
IETBFLIEMCR
[In master transmission]
[In slave transmission]
Communications frame
Communications frame
Register
Register
Notes: 1. In slave transmission, the received master address is not saved. If the unit is locked,
address comparison performed.
2. The received slave address is compared with IEAR1 and IEAR2, and if these addresses
match, operation continues.
3. In slave transmission, the received control bits are not saved. The received control bits
are decoded to decide the subsequent operation.
IETB001 to IETB128
Message length bits
Data bitsSlave addressMaster address Control bits
Message length bits
Data bitsSlave addressMaster address Control bits
IESA1, IESA2IEAR1, IEAR2
(*1) (*3)
(*2)
IEAR1, IEAR2 IETBFL
IETB001 to IETB128
Figure 21.6 Relationship between Transfer Format and Each Register during IEBus Data
Transmission