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| 型號(hào)： | BU-62864G3-122Z |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72 |
| 封裝： | 1 INCH, CERAMIC, QFP-72 |
| 文件頁(yè)數(shù)： | 61/99頁(yè) |
| 文件大?。?/td> | 578K |
| 代理商： | BU-62864G3-122Z |
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Data Device Corporation
62743_pre7_noSA-DB.DOC
www.ddc-web.com
8-07-02
64
Alternatively, there is a Busy lookup table in the PCI Enhanced Mini-ACE shared
RAM. By means of this table, it is possible for the host processor to set the busy bit
for any selectable subset of the 128 combinations of broadcast/own address, T/R*
bit, and subaddress.
If the busy bit is set for a transmit command, the PCI Enhanced Mini-ACE RT will
respond with the busy bit set in the status word, but will not transmit any data
words. If the busy bit is set for a receive command, the RT will also respond with
the busy status bit set. There are two programmable options regarding the
reception of data words for a non-mode code receive command for which the RT
is busy: (1) to transfer the received data words to shared RAM; or (2) to not
transfer the data words to shared RAM.
RT ADDRESS
The PCI Enhanced Mini-ACE offers several different options for designating the
Remote Terminal address. These include the following: (1) hardwired, by means
of the 5 RT ADDRESS inputs, and the RT ADDRESS PARITY input; (2) by means
of the RT ADDRESS (and PARITY) inputs, but latched via hardware, on the rising
edge of the RT_AD_LAT input signal; (3) input by means of the RT ADDRESS
(and PARITY) inputs, but latched via host software; and (4) fully software
programmable, by means of an internal register. In all four configurations, the RT
address is readable by the host processor.
RT BUILT-IN TEST (BIT) WORD
The bit map for the PCI Enhanced Mini-ACE’s internal RT Built-in-Test (BIT)
Word is indicated in Table 58.
Table 58. RT BIT Word
Bit
DESCRIPTION
15(MSB)
TRANSMITTER TIMEOUT
14
LOOP TEST FAILURE B
13
LOOP TEST FAILURE A
12
HANDSHAKE FAILURE
11
TRANSMITTER SHUTDOWN B
10
TRANSMITTER SHUTDOWN A
9
TERMINAL FLAG INHIBITED
8
BIT TEST FAIL
7
HIGH WORD COUNT
6
LOW WORD COUNT
5
INCORRECT SYNC RECEIVED
4
PARITY/MANCHESTER ERROR RECEIVED
3
RT-to-RT GAP/SYNC/ADDRESS ERROR
2
RT-to-RT NO RESPONSE ERROR
1
RT-to-RT 2ND COMMAND WORD ERROR
0(LSB)
COMMAND WORD CONTENTS ERROR
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