NEC V850/SB1TM User Manual page 444

Table 19-5. Acknowledge Signal Output Condition of Control Field
Communication Lock Status
Target (SLVRQ) (LOCK)
Slave Lock = 1
Specification = 1 Unlock = 0
No Specification
= 0
1
Communication Lock Status
Target (SLVRQ) (LOCK)
Slave Lock = 1
Specification = 1 Unlock = 0
No Specification
= 0
1
Caution If the received control data is other than the data shown in Table 19-5, × × × × (ACK is not returned) is
unconditionally assumed.
Remarks 1.
: ACK is returned.
×: ACK is not returned.
2. ENSLVTX: Bit 4 of the IEBus unit control register (BCR)
ENSLVRX: Bit 3 of the IEBus unit control register (BCR)
LOCK:
SLVRQ:
PAR:
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CHAPTER 19 IEBus CONTROLLER (V850/SB2)
(a) If received control data is AH, BH, EH, or FH
Master Unit
Identification
(Match with PAR)
Lock Request
Unit = 1
Other = 0
0 don't care
1 1
Other than above
(b) If received control data is 0H, 3H, 4H, 5H, 6H, or 7H
Master Unit
Identification
(Match with PAR)
Lock Request
Unit = 1
Other = 0
0 don't care
1
1
Other than above
Bit 2 of the IEBus unit status register (USR)
Bit 6 of the IEBus unit status register (USR)
IEBus partner address register
User's Manual U13850EJ4V0UM
Slave Slave Reception
Transmission Enable
Enable (ENSLVRX)
(ENSLVTX)
don't care 1
Slave Slave Reception
Transmission Enable
Enable (ENSLVRX)
(ENSLVTX)
0 don't care
1
don't care
1
Received Control Data
AH BH EH FH
×
Received Control Data
0H 3H 4H 5H 6H 7H
× × × ×
× ×
× × ×
× ×
×