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Section 21 IEBus
TM
Controller
Page 1108 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
3 to 0 CTL*
1
0000 R/W Control
Set the control bits in the control field for master
transmission.
0000: Reads slave status
0001: Undefined*
3
0010: Undefined*
3
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*
3
1001: Undefined*
3
1010: Writes command and locks*
2
1011: Writes data and locks*
2
1100: Undefined*
3
1101: Undefined*
3
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 from master unit to slave unit
CTL3 = 0: Transfer is from slave unit to master unit
2. Control bits to lock and unlock
3. Setting prohibited.