Transmit Data; Table 13.4.7A Control Bits Setting; Table 13.4.7B The Control Command That Can Be Executed By A Locked Slave Unit - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

13.4 IEBus Communication Protocol

13.4.7 Transmit data

The content in data field is controlled by the control bits in control field and is shown below:
0H
1H
2H
3H
4H
5H
6H
7H
8H
9H
AH
BH
CH
DH
EH
FH
Note1: The direction in which telegraph length bits in the telegraph length field and data in
the data field are transferred is changed depending on the value of Bit 3 as follows:
When Bit 3 is '1': Transfer from master unit to slave unit
When Bit 3 is '0': Transfer from slave unit to master unit
Note2: Control bits 3H, 6H, AH, BH are used to lock and unlock the unit.
When those undefined control bits 1H, 2H, 8H, 9H, CH, DH has been received, the
acknowledge bit is not returned.
When the slave is locked, it can only execute the following command requesting by other units besides of
the master executing the lock command:

Table 13.4.7b The control command that can be executed by a locked slave unit

Bit 3
0H
4H
5H
170 Chapter 13: IE Bus

Table 13.4.7a Control bits setting

Note
Bit 3
Bit 2
1
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 1
1 1
1 1
1 1
Bit 2 Bit 1
0 0
0 1
0 1
Bit 1 Bit 0
0 0 Slave status (SSR) read
0 1 Undefined
1 0 Undefined
1 1 Data read and lock
0 0 Lock address read (Lower 8 bits)
0 1 Lock address read (Upper 4 bits)
Slave status (SSR) read and
1 0
1 1 Data read
0 0 Undefined
0 1 Undefined
1 0 Command write and lock
1 1 Data write and lock
0 0 Undefined
0 1 Undefined
1 0 Command write
1 1 Data write
Bit 0 Function
0 0 Slave status (SSR) read
0 0 Lock address read (Lower 8 bits)
0 1 Lock address read (Upper 4 bits)
Note 2
Function
unlock
MB90580 Series