CT2553-PCB Aeroflex Circuit Technology, CT2553-PCB Datasheet - Page 20

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

SCDCT2553PCB Rev A Preliminary 7/13/06
FIGURE 26 – MT DATA STORAGE
IN RAM, INCREMENTS INTERNAL
STORE IN INTERNAL REGISTER
STORE RETREIVED 1553 WORD
IN RAM, INCREMENT INTERNAL
STORE IDENTIFICATION WORD
GET STACK POINTER FROM
CHAN B XMITTER TIMEOUT
CHAN A XMITTER TIMEOUT
CHAN B LOOP TEST FAILURE
CHAN A LOOP TEST FAILURE
CHAN B XMITTER SHUTDOWN
CHAN A XMITTER SHUTDOWN
NON-MODE BROADCAST CMD TO XMIT
MESSAGE HIGH WORD COUNT
MESSAGE LOW WORD COUNT
ILLEGAL MODE CODE OR ILLEGAL
BROADCAST WITH MODE CODE
MODE CODE OR T/
CHAN A/B LOOP TEST FAILURE
HANDSHAKE FAILURE
CHAN A/B XMITTER TIMEOUT
START COMMAND ISSUED
WORD 100 IN RAM AND
Notes:
(1) Bits 0-2 and 10-13 are latched and only cleared by a mode reset command or a master RESET.
(2) Bits 3-7 are cleared at the start of each new message and updated at the end of the message. They
(3) Bits 8-9 are set by the mode command for Transmitter Shutdown and are cleared by the mode
WORD TRANSFERRED
ADDRESS REGISTER
ADDRESS REGISTER
ACROSS 1553 BUS
OPERATION
reflect the present command word.
command for Override Transmitter Shutdown, Reset RT or a master RESET.
?
FIGURE 27 – BUILT-IN-TEST WORD (RTU MODE)
YES
R
ERROR
NO
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0
20
MT DATA STORAGE.
in a MT data Storage operation.
INTERRUPTS:
52) and SA/MC - 2 (on 52) represents B6, B7, and B8
counter outputs in the MT mode. B6 counts every 32
words transferred, B7 every 64 words, and B8 every 128
words. These counter outputs can be used to generate
interrupts to the subsystem to insure proper servicing of
Memory. The Data Word and Identification Word
transfers increment the counter by two.
BUILT-IN-TEST WORD (RTU MODE)
The CT2553-PCB contains a 14 bit Built-In-Test (BIT)
word register which stores information about the
condition of the RTU. When a Mode Command is
received to transmit BIT word, the contents of this
register are transmitted over the 1553 data bus. Figure 27
shows the meaning of each bit in the BIT register.
Information is included regarding transmitter timeouts,
loop test failures, transmitter shutdown, subsystem
handshake failure, and the results of individual message
validations.
MODE CODES
The CT2553-PCB implements all mode codes applicable
to dual redundant systems. Mode codes can also be
illegalized using the appropriate I/O signals. Mode
command illegalization and handling are detailed in the
RTU Operation section and listed in Table 6.
SA/MC - 0 (pin 13), SA/MC - 1 (pin
Figure 26 shows the steps
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