參數(shù)資料
型號(hào)： BU-62843
英文描述： MIL-STD-1553 Components |PCI-Enhanced Mini-ACE?
中文描述： 符合MIL - STD - 1553器件|的PCI增強(qiáng)迷你ACE論壇？
文件頁(yè)數(shù)： 36/56頁(yè)
文件大?。?/td> 368K
代理商： BU-62843
36
Data Device Corporation
www.ddc-web.com
BU-62743/62843/62864
A-03/03-1M
the counter reaches the Stack Pointer address of 0100 or 0104,
the initial pointer value stored in this shared RAM location will be
overwritten by the monitored data and ID Words.When the inter-
nal counter reaches an address of FFFF (or 0FFF, for a PCI
Enhanced Mini-ACE with 4K RAM), the counter rolls over to
0000.
WORD MONITOR TRIGGER
In the Word Monitor mode, there is a pattern recognition trigger
and a pattern recognition interrupt. The 16-bit compare word for
both the trigger and the interrupt is stored in the Monitor Trigger
Word Register. The pattern recognition interrupt is enabled by
setting the MT Pattern Trigger bit in the Interrupt Mask Register.
The pattern recognition trigger is enabled by setting the Trigger
Enable bit in Configuration Register #1 and selecting either the
Start-on-trigger or the Stop-on-trigger bit in Configuration
Register #1.
The Word Monitor may also be started by means of a low-to-high
transition on the EXT_TRIG input signal.
SELECTIVE MESSAGE MONITOR MODE
The PCI Enhanced Mini-ACE Selective Message Monitor pro-
vides monitoring of 1553 messages with filtering based on RT
address, T/R bit, and subaddress with no host processor inter-
vention.By autonomously distinguishing between 1553 command
and status words, the Message Monitor determines when mes-
sages begin and end, and stores the messages into RAM, based
on a programmable filter (RT address, T/R bit, and subaddress).
The selective monitor may be configured as just a monitor, or as
a combined RT/Monitor. In the combined RT/Monitor mode, the
PCI Enhanced Mini-ACE functions as an RT for one RT address
(including broadcast messages), and as a selective message
monitor for the other 30 RT addresses.The PCI Enhanced Mini-
ACE Message Monitor contains two stacks, a command stack
and a data stack, that are independent from the BC/RT com-
mand stack. The pointers for these stacks are located at fixed
locations in the RAM.
MONITOR SELECTION FUNCTION
Following receipt of a valid command word in Selective Monitor
mode, the PCI Enhanced Mini-ACE will reference the selective mon-
itor lookup table to determine if this particular command is enabled.
The address for this location is determined by means of an offset
based on the RT Address, T/R bit, and Subaddress bit 4 of the cur-
rent command word, and concatenating it to the monitor lookup
table base address of 0280 (hex).The bit location within this word is
determined by subaddress bits 3-0 of the current command word.
If the specified bit in the lookup table is logic "0", the command
is not enabled, and the PCI Enhanced Mini-ACE will ignore this
command. If this bit is logic "1", the command is enabled and the
PCI Enhanced Mini-ACE will create an entry in the monitor com-
mand descriptor stack (based on the monitor command stack
COMMAND WORD CONTENTS ERROR
0(LSB)
RT-to-RT 2ND COMMAND WORD ERROR
1
RT-to-RT NO RESPONSE ERROR
2
TRANSMITTER SHUTDOWN B
TRANSMITTER SHUTDOWN A
RT-to-RT GAP / SYNC / ADDRESS ERROR
3
PARITY / MANCHESTER ERROR RECEIVED
4
INCORRECT SYNC RECEIVED
5
LOW WORD COUNT
6
HIGH WORD COUNT
7
BIT TEST FAILURE
8
TERMINAL FLAG INHIBITED
9
10
HANDSHAKE FAILURE
12
11
LOOP TEST FAILURE A
13
LOOP TEST FAILURE B
14
TRANSMITTER TIMEOUT
15(MSB)
DESCRIPTION
BIT
TABLE 58. RT BIT WORD
Third Received 1553 Word
Third Identification Word
Received 1553 Words and Identification Words
FFFF
Stack Pointer
(Fixed Location - gets overwritten)
0100
0005
Second Identification Word
0003
0004
Second Received 1553 Word
0002
First Identification Word
0001
First Received 1553 Word
0000
FUNCTION
HEX
ADDRESS
TABLE 59. TYPICAL WORD MONITOR MEMORY
MAP
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