Datasheet

Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Rev. 6.00 Mar. 18, 2010 Page 503 of 982
REJ09B0054-0600
Bit Bit Name
Initial
Value
R/W Description
3
2
1
0
CTL3
*
1
CTL2
CTL1
CTL0
0
0
0
0
R/W
R/W
R/W
R/W
Control bits
Set the control bits in the control field for master
transmission.
0000: Reads slave status
0001: Undefined. Setting prohibited.
0010: Undefined. Setting prohibited.
0011: Reads data and locks
*
2
0100: Reads locked address (lower 8 bits)
0101: Reads locked address (upper 4 bits)
0110: Reads slave status and unlocks
*
2
0111: Reads data
1000: Undefined. Setting prohibited.
1001: Undefined. Setting prohibited.
1010: Writes command and locks
*
2
1011: Writes data and locks
*
2
1100: Undefined. Setting prohibited.
1101: Undefined. Setting prohibited.
1110: Writes command
1111: Writes data
Notes: 1. CTL3 decides the data transfer direction of the message length bits in the message
length field and data bits in the data field:
CTL3 = 1: Transfer is performed from master unit to slave unit
CTL3 = 0: Transfer is performed from slave unit to master unit
2. Control bits to lock and unlock