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參數(shù)資料
| 型號(hào)： | BUS-65164-130K |
| 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, CDFP70 |
| 封裝： | 1.900 X 1 INCH, 0.215 INCH HEIGHT, FP-70 |
| 文件頁數(shù)： | 31/40頁 |
| 文件大?。?/td> | 349K |
| 代理商： | BUS-65164-130K |
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Remote Terminal Failure - Latched low level output that goes low if a loopback failure (or transmitter shutdown
timeout) has occurred during a transmission cycle. A loopback failure occurs under any of the following conditions:
(1) the first transmitted word (Status Word) contains an incorrect RT address field, (2) the received version of any
transmitted word is either invalid or contains the incorrect sync type, (3) the received 16-bit data pattern for the last
transmitted word does not match that of the transmitted version of the word and/or (4) A transmitter timeout (668
ms) has occurred. Reset by the start of the next transmission cycle (Status Word) or a low level on the RESET
input. An RTFAIL condition (low level output on RTFAIL) will cause the Terminal Flag bit in the RT Status Register
to be set. When this occurs, the RT Flag Status Word bit will be set in response to the next valid nonbroadcast
command.
DESCRIPTION
I/O
NAME
PIN NO.
I
BUSY
68
TABLE 5. BUS-65153 PIN DESCRIPTIONS - CONTINUED
RT STATUS WORD INPUTS (4)
O
I
SSFLAG
67
SERVREQ
66
ILLCMD
65
O
DESCRIPTION
I/O
NAME
PIN NO.
O
INCMD
41
MESSAGE TIMING OUTPUT SIGNALS (5)
O
NBGRT
39
RTFAIL
38
GBR
37
ME
42
FACTORY TEST INPUTS (3)
PIN NO.
NAME
I/O
DESCRIPTION
Connect to + 5 volts.
I
48
47
46
Notes:
1. A13 through A0, CS, and WRT will be placed in a high impedance state if ADDR_ENA is high and DTACK is inactive (high).
2. The RT Status Word inputs ILLCMD, SERVREQ, SSFLAG, and BUSY are sampled approximately 5 ms following the mid-parity bit zero crossing of
the received Command Word.
Illegal Command Input. Active low Input used to illegalize any command. If low when sampled, the Message Error
bit (bit 10) in the Status Word will be set. The response to an illegal transmit command will be a Status Word only.
The only effect of illegalizing a receive command will to inhibit GBR. An illegalized mode code will not perform the
actual mode functions. (Note 2)
Service Request - Input signal used to control the Service Request bit (bit 8) in the Status Word. If low when sam-
pled, the Service Request bit will be set. If high, it will be logic”0”. (Note 2)
Subsystem Flag - Input signal used to control the Subsystem Flag bit (bit 2) in the Status Word. If low when sam-
pled, the Subsystem Flag bit will be set. If high, the Subsystem Flag bit will be logic “0”. (Note 2)
Input signal used to control the Busy bit (bit 3) in the Status Word. If low when sampled, the Busy bit will be set. If
high, it will be cleared. Note, if the Busy bit is set and the command was a transmit command, only the Status
Word would be transmitted. Has no effect on data received following a receive command. (Note 2)
New Bus Grant - Low level output pulse (2 clock cycles wide), that is used to indicate the start of a new protocol
sequence in response to the Command Word just received from the 1553 bus.
Good Block Received - Low level output pulse (2 clock cycles wide) that is used to flag the subsystem that a valid,
legal, nonmode receive command with the correct number of data words has been received without a message
error and successfully transferred to the subsystem
In Command - Active low level output signal used to inform the subsystem that the BUS-65153 is presently servic-
ing a command that came in on the 1553 bus.
Message Error - Active low level output signal used to flag the subsystem that there was a message error on the
1553 bus communication (word, gap, or word count error). This output goes low upon detecting the error and is
reset at the start of the next NBGRT pulse or master reset. If this output goes low, all further command servicing is
aborted.
FACTORY TEST
POINT
FACTORY TEST
POINT
FACTORY TEST
POINT
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