CT1611 Datasheet, PDF (15/24 Pages) Aeroflex Circuit Technology – DMA Controller with Buffer Memory,MIL-STD-1750A Compatible

Register Name
Summary of Registers
General Function
Op Code
BC Command WD 1 Register
1. Contains the command word for all bus transactions (first for RT to RT transfers).
(BC only)
2. Automatically loaded in polling operation.
XX00
CW2 / AMD / VEC Register
Transaction Word Register
1. Used in both RT and BC.
2. Contains second command word for RT to RT transfers. (BC only)
3. Contains associated mode data for mode command requiring transmitted data. (BC
only)
4. Optionally automatically loaded in polling operation. (BC only)
5. Contains vector word. (RTU only)
1. Contains additional information required to fully define a bus transaction, i.e. bus
selection, transfer type (normal/mode). (BC only)
2. Automatically loaded in polling operation.
XX02
XX0C
Transaction Address Register 1. Contains starting address for BC polling operation.
XX0E
Last Transaction Register
Operation Register
1. Contains address of last transaction.
2. Used to determine where in command stack, a failed transaction command is
located.
1. Sets operational mode i.e. Bus Controller Remote Terminal
2. Control of status word bits in RTU mode:
a. BUSY
b. SSERR
c. SERVRQST
XX34
XX0A
Error Latch
1. Contains information on transactions occurring on 1553B bus.
2. Primarily used in bus controller mode. Useful in RTU mode especially during
system debugging.
XX32
RTU Command Word Register 1. Contains all commands received by RTU. (RTU only). Includes normal data and
mode commands.
XX36
RTU Receive Command Word
Register
1. Contains only valid receive commands. (RTU only)
2. Loaded after data block validated.
3. Doubled buffered version of RTU command word register.
XX38
Stat Word 1 Register
1. Contains returned status word. (BC only).
2. Contains first returned status word for RT to RT transfers. (BC only)
XX3C
Stat WD2 / RMD Register
1. Contains second returned status word for RT to RT transfers. (BC only).
2. Contains returned rode data for mode commands. (BC only). Sync word as RTV.
XX3A
SCDCT1611 Rev A
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