Datasheet

Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Rev. 6.00 Mar. 18, 2010 Page 506 of 982
REJ09B0054-0600
14.3.7 IEBus Slave Address Setting Register 2 (IESA2)
IESA2 sets the upper 8 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
3
2
1
0
ISA11
ISA10
ISA9
ISA8
ISA7
ISA6
ISA5
ISA4
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 Slave Address
Set upper 8 bits of the communications destination
slave unit address
14.3.8 IEBus Transmit Message Length Register (IETBFL)
IETBFL sets the message length for master or slave transmission.
Bit Bit Name Initial Value R/W Description
7
6
5
4
3
2
1
0
TBFL7
TBFL6
TBFL5
TBFL4
TBFL3
TBFL2
TBFL1
TBFL0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Transmit Message Length
Set the message length for master or slave
transmission.
If a value exceeding the maximum transmit bytes
for one frame is set in IETBFL, communications
are performed with two or more frames in some
communications modes. In this case, in or after the
second frame, the message length value should be
the number of bytes of the remaining
communications data, however, the initial IETBFL
setting remains unchanged. Therefore, for the
second frame or after, re-set the number of bytes
of the remaining communications data.