hi-6110 Holt Integrated Circuits, Inc., hi-6110 Datasheet - Page 14

• Manufacturer Part Number: hi-6110
• Description: Bc / Rt / Mt Message Processor
• Manufacturer: Holt Integrated Circuits, Inc.

MSB
MSB
MSB
MSB
MSB
COMMAND WORD 1 REGISTER (Read only) Read Address: 0000
COMMAND WORD 2 REGISTER (Read only) Read Address: 0001
TRANSMIT
RECEIVED
RECEIVE DATA FIFO (Read only) Read Address: 0100
15 14 13 12 11 10 9
15 14 13 12 11 10 9
15 14 13 12 11 10 9
15 14 13 12 11 10 9
15 14 13 12 11 10 9
RT Address
RT Address
RT Address
RT Address
STATUS WORD REGISTER (Read only) Read
STATUS
MIL-STD-1553 Message Data Word 15:0
1
WORD
Subaddress /
Subaddress /
8
8
8
8
8
Mode
Mode
REGISTER (Write only) Write
R
R
7
7
7
7
7
HI-6110 (REMOTE TERMINAL MODE)
R
R
6
6
6
6
6
R
R
5
5
5
5
5
Data Word Count /
Data Word Count /
4
4
4
4
4
HOLT INTEGRATED CIRCUITS
Mode Code
Mode Code
3
3
3
3
3
2
2
2
2
2
1
1
1
1
1
RT OPERATION
0
0
0
0
0
LSB
LSB
LSB
LSB
LSB
14
Address: 0011
Address: X000
The Receive Data FIFO is 32-words deep and holds MIL-
STD-1553 data words received by the RT. The FIFO is cleared
on Master Reset or after all words have been read by the host.
A low FFEMPTY flag (pin or Status register) means FIFO data
is available to be read by the host. Successive data reads
cause FFEMPTY to go high when the last data word is read.
For all commands except RT to RT, the Command Word 1
register contains the last valid Command Word received.
If the last valid command received was RT to RT, the
Command Word 1 register holds the first (receive) command
word and the Command Word 2 Register holds the second
(transmit) command word. Then if Message Register bits 3
and 9 are both 0, the Command Word 1 register contains the
valid command.
If the last valid command received was RT to RT, the
Command Word 2 register contains the second (transmit)
command word. (See note above for Command Word 1.)
Whenever Message Register bit 3 or bit 9 is set, the valid
command is contained in the Command Word 2 register.
Whenever RCV is asserted, the active Command Word
register can always be determined by checking Message
Register bits 3 and 9.
The Transmit Status Word register holds bits 10:0 for the
status word transmitted by the remote terminal in response to
a (non-broadcast) command. Status word bits 15:11 are
automatically set to match the RT Address present at the
RTA4:0 input pins. The HI-6110 automatically transmits a
status word in response to valid non-broadcast commands.
The register may be changed anytime prior to status word
mid-sync bit.
affected by MR, master reset.
Updated only during RT to RT transmit messages, the
Received Status Word register captures the MIL-STD-1553
status word transmitted by the receiving remote terminal.
The Transmit Status Word register is not