5962F9211804QZX View Datasheet(PDF) - Aeroflex UTMC
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5962F9211804QZX Datasheet PDF : 177 Pages
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Caution: Per the MIL-STD-1553 specification (sections
4.3.3.5.1.7.9 and 30.4.3), a remote terminal must “complete the
reset function within 5µs following transmission of the status
word.” If the AUTOEN function is enabled in the SµΜΜIT,
reset may require additional time depending on the application.
2.9 MIL-STD-1553A Operation
To maximize flexibility, the SµΜΜIT has been designed to
operate in many different systems which use various protocols.
Specifically, two of the protocols that the SµΜΜIT may be
interfaced to are MIL-STD-1553A and MIL-STD-1553B. To
meet these protocols, the SµΜΜIT may be configured through
an external pin or through control register bits (depending on
the state of the LOCK pin). Table 4 defines the three ways to
program the SµΜΜIT.
Table 4. MIL-STD-1553A Operation
A/B STD XMTSW
(pin or bit) (bit only)
RESULT
(protocol selected)
0
X
1553B response, 1553B
Standard
1
0
1553A response, 1553A
Standard
1
1
1553A response, Auto execute
the TRANSMIT STATUS
WORD mode code
When configured as a remote terminal to meet MIL-STD-
1553A, the SµΜΜIT will operate as follows:
• Responds with a status word within 7µs;
• Ignores the T/R bit for all mode codes;
• All mode codes are defined without data;
• All mode codes use mode code transmit control and
information words;
• Mode code 00000 is defined as Dynamic Bus Control
(DBC);
• Subaddress 00000 defines a mode code;
• ME and TF bits are defined in the 1553 status word; all
other status word bits are programmable (i.e., NO
BUSY mode, etc.);
• Broadcast of all mode codes, except Mode Code 00000
(DBC) and Mode Code 00010 (Transmit Status word if
enabled), is allowed;
• To illegalize a Mode Code, the user needs to
illegalize both the receive and transmit versions;
• Illegalization of row 1F (hex) is not automatic.
34
SµMMIT FAMILY
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