5962F9466309VXA View Datasheet(PDF) - Aeroflex UTMC
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5962F9466309VXA Datasheet PDF : 177 Pages
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2.3.1 Subaddress Receive Data
For receive commands, the SRT stores data words plus two additional words. The SRT adds a Receive Information word and Time-
Tag word to each receive command data packet. The SRT places the Receive Information word and Time-Tag word ahead of the
data words associated with a receive command (see figures 5, 6 and 7). When message errors occur, the SRT enters the Receive
Information word, and Time-Tag word. Once a message error condition is observed, all data words are considered invalid.
Data storage occurs at the memory location pointed to by the data pointer plus two locations.
2.3.1.1 Receive Information (Info) Word
The following bits describe the Receive Information Word contents.
Bit
Number
Mnemonic
Description
15-11
WC(4:0)
Word Count Bits. These five bits contain word count information extracted from the
transmit command word bits 15 to 19.
10
N/A
Not Applicable.
9
CHA/B
Channel A/B. Assertion of this bit indicates that the message was received on channel A.
Conversely, if this bit is set to logic zero, the message was received on channel B.
8
RTRT
Remote Terminal to Remote Terminal transfer. The command processed was a RT-to-RT
transfer.
7
ME
Message Error. Assertion of this bit indicates a message error condition was observed
during processing. See bits 0 to 4 for details.
6-5
N/A
Not Applicable.
4
ILL
Illegal Command Received. Assertion of this bit indicates the command received was an
illegal command.
3
TO
Time-Out Error. Assertion of this bit indicates the SRT did not receive the proper number
of data words, i.e., the number of data words received was less than the word count
specified in the command word.
2
OVR
Overrun Error. Assertion of this bit indicates the SRT received a word when none was
expected or the number of data words received was greater than expected.
1
PRTY
Parity Error. Assertion of this bit indicates the SRT observed a parity error in the incoming
data words.
0
MAN
Manchester Error. Assertion of this bit indicates the SRT observed a Manchester error in
the incoming data words.
2.3.2 Subaddress Transmit Data
The host or subsystem is responsible for organization of the data packet (i.e., N data words) into memory and establishing the
applicable data pointer. The host or subsystem allocates two memory locations at the top of the data packet for the storage of the
Transmit Information word and Time-Tag word. An example transmit data structure for three words is shown below.
Data Pointer A ----->
equals 0100 (hex)
0100
0101
0102
0103
0104
(hex)
(hex)
(hex)
(hex)
(hex)
XXXX
XXXX
FFFF
FFFF
FFFF
;reserved for Transmit Info word
;reserved for Time-Tag word
;data word
;data word
;data word
Note: Data Pointer A points to the top of the data structure not to the top of the data words.
28
SµMMIT FAMILY
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