CHAPTER 18 IEBus CONTROLLER (V850/SC2)
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User’s Manual U15109EJ3V0UD
Table 18-5. Control Field Acknowledge Signal Output Conditions
(a) When received control data is AH, BH, EH, FH
Received control data
Communication
type
(ALL TRANS)
Individual
communication
= 1
Broadcast
communication
= 1
Communication
target (SLVRQ)
Slave
specification
= 1
No specification
= 0
Lock status
(LOCK)
Locked = 1
Unlocked = 0
Master unit
judgment
(match with PAR)
Lock request unit =
1
Other = 0
Slave
transmission
enable
(ENSLVTX)
Slave reception
enable
(ENSLVRX)
AH
BH
EH
FH
0
1
0
don’t care
don’t care
1
1
1
Other than above
×
(b) When received control data is 0H, 3H, 4H, 5H, 6H, 7H
Received control data
Communication
type
(ALL TRANS)
Individual
communication
= 1
Broadcast
communication
= 1
Communication
target (SLVRQ)
Slave
specification
= 1
No specification
= 0
Lock status
(LOCK)
Locked = 1
Unlocked = 0
Master unit
judgment
(match with PAR)
Lock request unit =
1
Other = 0
Slave
transmission
enable
(ENSLVTX)
Slave
reception
enable
(ENSLVRX)
0H 3H 4H 5H 6H 7H
0
1
0
don’t care
0
don’t care
×
×
×
×
1
×
×
1
don’t care
×
×
×
1
×
×
1
Other than above
×
Caution
If the received control data is other than as shown in Table 18-5, it becomes
××××
unconditionally
(ACK is not returned).
Remarks 1.
: ACK returned
×
: ACK not returned
2.
ENSLVTX: Bit 4 of IEBus unit control register (BCR)
ENSLVRX: Bit 3 of IEBus unit control register (BCR)
SLVRQ:
Bit 6 of IEBus unit status register (USR)
LOCK:
Bit 2 of IEBus unit status register (USR)
PAR:
IEBus partner address register