Datasheet

Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Rev. 6.00 Mar. 18, 2010 Page 505 of 982
REJ09B0054-0600
14.3.5 IEBus Master Unit Address Register 2 (IEAR2)
IEAR2 sets the upper 8 bits of the master unit address. In master communications, this register
becomes the master address field value. In slave communications, this register is compared with
the received slave address field.
Bit Bit Name Initial Value R/W Description
7
6
5
4
3
2
1
0
IAR11
IAR10
IAR9
IAR8
IAR7
IAR6
IAR5
IAR4
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Upper 8 Bits of IEBus Master Unit Address
Set the upper 8 bits of the master unit address.
14.3.6 IEBus Slave Address Setting Register 1 (IESA1)
IESA1 sets the lower 4 bits of the communications destination slave unit address. For slave
communications, it is not necessary to set this register.
Bit Bit Name Initial Value R/W Description
7
6
5
4
ISA3
ISA2
ISA1
ISA0
0
0
0
0
R/W
R/W
R/W
R/W
Lower 4 Bits of IEBus Slave Address
These bits set the lower 4 bits of the
communications destination slave unit address
3 to 0 ⎯ All 0 ⎯ Reserved
These bits are always read as 0 and cannot be
modified.