CT2553-PCB Aeroflex Circuit Technology, CT2553-PCB Datasheet - Page 12

• Manufacturer Part Number: CT2553-PCB
• Description: Advanced Integrated Mux Aim Hybrid For Mil-std-1553 / Sae-as15531 In Pcb Style
• Manufacturer: Aeroflex Circuit Technology

TIME TAGGING (OPTIONAL)
The CT2553-PCB will automatically access an external,
3-state device (i.e., counter) at the start and end of each
message in BC or RTU modes. The CT2553-PCB output,
TAGEN
common, 16-bit data highway while executing a
memory-write cycle. The device's value is written into the
second location of the Descriptor Stack Entry. If a counter is
used its clock, enable, and reset control lines are connected
per system requirement (See Figure 15). If no external
device is attached to the data bus, an expected value of
FFFF (H) will be written into the Time Tag location within
the Descriptor Stack.
Note that the 8-bit Time Tag value generated in the 1553
MT mode of operation is implemented using an 8-bit
counter internal to the CT2553-PCB (See MT operation).
SCDCT2553PCB Rev A Preliminary 7/13/06
(pin 76), enables the device's output onto the
BROADCAST
BROADCAST
BROADCAST
COMMAND
COMMAND
COMMAND
(NO DATA)
(NO DATA)
CONTROL
LOOPED
WORD
BACK
DATA WORD
DATA WORD
DATA WORD
DATA WORD
COMMAND
DATA BLOCK
CONTROL
RECEIVE
RECEIVE
LOOPED
STATUS
WORD
RECEIVE
BACK
LAST
LAST
1
2
FIGURE 16 – BC MESSAGE FORMATS
DATA BLOCK
DATA WORD
DATA WORD
DATA WORD
COMMAND
COMMAND
TRANSMIT
TRANSMIT
TRANSMIT
CONTROL
RECEIVED
LOOPED
STATUS
WORD
BACK
LAST
1
2
TERMINAL TO
DATA BLOCK
DATA WORD
DATA WORD
FROM XMTR
1 RECEIVED
2 RECEIVED
LAST DATA
COMMAND
COMMAND
COMMAND
TRANSMIT
TRANSMIT
RECEIVED
RECEIVER
TERMINAL
CONTROL
RECEIVE
LOOPED
REMOTE
REMOTE
STATUS
WORD 2
STATUS
WORD 1
WORD
WORD
FROM
BACK
12
DATA BLOCK
MODE CODE
DATA WORD
DATA WORD
WITH DATA
DATA BUS
COMMAND
CONTROL
RECEIVE
D15 - D00
FIGURE 15 – BC/RT TAGGING (OPTIONAL)
LOOPED
FORMAT
STATUS
WORD
WORD
MODE
BACK
CPU
DATA BLOCK
DATA WORD
MODE CODE
WITH DATA
COMMAND
COMMAND
RECEIVED
TRANSMIT
CONTROL
LOOPED
FORMAT
STATUS
OE
WORD
MODE
WORD
MODE
BACK
D15 - D00
DATA
BUS
THREE-STATE
COUNTER
MODE CODE
COMMAND
COMMAND
CONTROL
WITHOUT
LOOPED
STATUS
WORD
WORD
MODE
MODE
BACK
DATA
IOEN
OE
BROADCAST
DATA WORD
DATA WORD
DATA WORD
BROADCAST
WORD LAST
WITH DATA
COMMAND
COMMAND
CONTROL
LOOPED
TAGEN
WORD
DATA
BACK
Aeroflex Plainview
1
2
CT2553-PCB