HI-6120 HOLTIC [Holt Integrated Circuits], HI-6120 Datasheet - Page 81

• Manufacturer Part Number: HI-6120
• Description: MIL-STD-1553 Remote Terminal ICs
• Manufacturer: HOLTIC [Holt Integrated Circuits]

Increasing
Memory
Address
message does not affect DPB bit, but the following message resets BCAST bit. The interspersed broadcast command
Following reset (which resets Control Word DPB bit), the subaddress transacts 4 commands of 32 data words each.
Message #2 is a broadcast command, while the other three messages are non-broadcast. Notice that the broadcast
The NOTICE 2 option is enabled so the device segregates data from broadcast and non-broadcast messages.
Data Buffer B
Data Buffer A
Subaddress
Subaddress
Subaddress
Data Buffer
Broadcast
Assigned
Assigned
Assigned
Figure 11. Ping-Pong Buffer Mode Example for a Receive Subaddress
Receive Subaddress
B’cast Data Pointer
Msg Info Word BC
Time-Tag Word BC
Descriptor Block
Data Words 2-31
Data Words 2-31
Data Words 2-31
Msg Info Word B
Msg Info Word A
Time-Tag Word B
Time-Tag Word A
Data Pointer B
Data Pointer A
Data Word 32
Data Word 32
Data Word 32
Control Word
does not affect alternation between Buffer A and Buffer B.
Data Word 1
Data Word 1
Data Word 1
for a
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
0x0565
0x0547 - 0x0564
0x0546
0x0545
0x0544
0x0543
0x0525 - 0x0542
0x0524
0x0523
0x0522
0x0521
0x0503 - 0x0520
0x0502
0x0501
0x0500
RAM
Address
Broadcast Data Pointer = 0x0544 start address in RAM
Data Pointer B = 0x0522 Buffer B start address in RAM
Data Pointer A = 0x0500 Buffer A start address in RAM
Control Word = 0x2010 Ping-Pong Mode, IBR Interrupt
Initialized Descriptor Values
81
Receive Message #2
Broadcast, 32 Data Words
Device resets Control Word
DPB and BCAST bits
Receive Message #3
Non-Broadcast, 32 Data Words
Device resets Control Word
DPB bit
Receive Message #1
Non-Broadcast, 32 Data Words
Device sets Control Word BCAST
bit (DPB bit remains static)
IBR interrupt is generated
Message #4 also uses
this buffer, if not broadcast