Datasheet

Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Rev. 6.00 Mar. 18, 2010 Page 510 of 982
REJ09B0054-0600
14.3.14 IEBus Receive Buffer Register (IERBR)
IERBR is a 1-byte read-only buffer that stores data received in master or slave reception. This
register can be read when the RxRDY flag in IERSR is set to 1. This register indicates the data
field value both in master and slave receptions. This register cannot be modified.
Figure 14.7 shows the relationship between transmission signal format and registers in IEBus data
reception.
Bit Bit Name Initial Value R/W Description
7
6
5
4
3
2
1
0
RBR7
RBR6
RBR5
RBR4
RBR3
RBR2
RBR1
RBR0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
One-byte read-only buffer that stores data received
in master or slave reception
IEMA1, IEMA2 IEAR1, IEAR2 IERCTL IERBFL IERBR
(*)
IEAR1, IEAR2 IESA1, IESA2 IERBFL IERBR
[In slave reception]
[In master reception]
Communications frame
Communications frame
Register
Note: * Received slave address is compared with IEAR1 and IEAR2. If they match,
the following operations are performed.
Register settings
Message length
bits
Data bitsSlave addressMaster address Control bits
Message length
bits
CTL3 to CTL0
in IEMCR
Data bitsSlave addressMaster address Control bits
Figure 14.7 Relationship between Transmission Signal Format and Registers
in IEBus Data Reception