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HOLT INTEGRATED CIRCUITS
24
MT OPERATION
HI-6110 (BUS MONITOR MODE)
MeInsruSevceReseved
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
MSB
LSB
RT Address
R
R
R
Boadcas CoDynamcBusConro Accepance
Busy
SubsysemFag
Trmna Fag
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
MSB
LSB
RF1
RCVB
RCVA
RF0
RFLAFFEMPTY
ERVALMESS
IDLE
Not used
0
0
0
0
0
0
0
MeInsruSevceReseved
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
MSB
LSB
RT Address
R
R
R
Boadcas CoDynamcBusConro Accepance
Busy
SubsysemFag
Trmna Fag
BIT
15-9
8
NAME
-
ERROR
FUNCTION
Notused.Thesebitsaresetto"0".
Thisbitissetto"0"afterresetorwhenthelastMIL-STD-1553messagesequencewasvalid.ERRORisset
toa"1"ifthelastsequencehadanerror.Thenatureofthemessageerrorcanbedeterminedbyexamining
theErrorRegister.TheERRORoutputpinreflectsthestateofthisbit.
Thisbitisa"0"afterresetorthelastMIL-STD-1553messagecontainedanerror.VALMESSgoeshighon
the completion of an error-free MIL-STD-1553 message sequence. VALMESS is reset to a zero each time
newvalidCommandWordisreceivedbytheRT.TheVALMESSoutputpinreflectsthestateofthisbit.
Registeraddressbit1forthelastwrittenwordregister.
Registeraddressbit0forthelastwrittenwordregister.
GoeslowwhenanewMIL-STD-1553CommandWordisreceivedbytheRT,oraStatusWordisreceived
fromthereceivingRTduringanRT-to-RTtransfer.
RFLAG
7
VALMESS
6
5
4
RF1
RF0
RFLAGN
RFLAGNreturnshighmomentarilyuponthereceiptof
outputreflectsthestateofthisbit.
If"0"thenthereceiveDataFIFOcontainsatleastonewordofdata.Thisbitissettoa"1"onreset, orwhen
theuserhasreadallavailablereceiveddatawordsfrom thereceiverDataFIFO.TheFFEMPTYoutputpin
reflectsthestateofthisbit.
Settoa"1"uponreceiptofavalidCommandWord.
Settoa"1"uponreceiptofavalidCommandWord.
If "1" then the RT is idle. This bit is a zero throughout the time the RT is processing a valid MIL-STD-1553
Command.message.Thebitreturnstoa"1"whenthemessageiscompleted.
anynew1553word.The
3
FFEMPTY
2
1
0
RCVB
RCVA
IDLE
A
TheRCVBoutputpinmirrorsthestateofthisbit.
TheRCV outputpinmirrorsthestateofthisbit.
holds the MIL-STD-1553 status word sent by the transmitting
remoteterminal.
The Status Register may be interrogated by the host at any
time. It provides information that allows the user to determine
whether the HI-6110 MT is busy monitoring an active MIL-
STD-1553 message and its progress. After a message
sequence has completed, the Status register indicates
whether an error was detected or if the message sequence
wassuccessful.
For non-broadcast single-RT commands, the Status Word 1
register holds the MIL-STD-1553 Status Word transmitted by
theRT.
For non-broadcast RT-RT commands, the Status Word 1
register holds the MIL-STD-1553 status word send by the
receivingremoteterminal.
STATUS WORD
REGISTER (Read only) Read
2
Address: 0011
STATUS REGISTER (Read only) Read Address: 0101
STATUS WORD
REGISTER (Read only) Read
1
Address: 1000