ACT3492 datasheet(7/49 Pages) AEROFLEX

Part #	ACT3492

Description	MIL-STD-1553B Remote Terminal, BUS Controller, or Passive Monitor Hybrid with Status Word Control Dual Low Power Monolithic BUS Tranceivers

Download	49 Pages

Scroll/Zoom	100%

Manufacturer	AEROFLEX [Aeroflex Circuit Technology]

Direct Link	http://www.aeroflex.com

Logo

7 / 49 page

Aeroflex Circuit Technology

SCD3492 REV B 6/26/01 Plainview NY (516) 694-6700

7

All other Mode Commands are serviced internally by the RT. The Terminal Flag and Message Error Status

Bits and BIT Word contents are controlled by the RT; however the subsystem has the option to set the

Message Error Bit and to control the reset conditions for the Terminal Flag and Subsystem Flag Bits in the

Status Word, and the Transmitter Timeout, Subsystem Handshake, and Loop Test Fail Bits in the BIT

Word.

Synchronize Mode Commands

Once the RT has validated the command word and checked for the correct address, the SYNC line is set

low. The signal WC4 will be set low for a Synchronize mode command, and high for a Synchronize with

data word mode command (See Figure 9). In a Synchronize with data word mode command, SYNC

remains low during the time that the data word is received. Once the data word has been validated, it is

passed to the subsystem on the internal highway IH08-IH715 in two bytes using IUSTB as a strobe signal

and H/L as the byte indicator (high byte first followed by low byte). SYNC being low should be used on the

enable to allow IUSTB to clock synchronize mode data to the subsystem.

If the subsystem does not need to implement either of these mode commands, the SYNC signal can be

ignored, since the RT requires no response from the subsystem.

Transmit Vector Word Mode Command

Figures 8 and 17 illustrates the relevant signal timings for an RT receiving a valid Transmit Vector Word

mode command. The RT requests data by setting VECTEN low. The subsystem should use H/L to enable

first the high byte and then the low byte of the Vector word onto the internal highway IH08-IH715.

It should be noted that the RT expects the Vector word contents to be already prepared in a latch ready for

enabling onto the internal highway when VECTEN goes low. If the subsystem has not been designed to

handle the Vector word mode command, it will be the fault of the Bus Controller if the RT receives such a

command. Since the subsystem is not required to acknowledge the mode command, the RT will not be

affected in any way by Vector word circuitry not being implemented in the subsystem. It will however

transmit a data word as the Vector word, but this word will have no meaning.

Reset Mode Command

Figure 7 shows the relevant signal timings for an RT receiving a valid reset mode command. Once the

command word has been fully validated and serviced, the RESET signal is pulsed low. This signal may be

used as a reset function for subsystem interface circuitry.

Dynamic Bus Allocation

This mode command is intended for use with a terminal which has the capability of configuring itself into a

bus controller on command from the bus. The line DBCREQ (See Figure 7) cannot go true unless the

DBCACC line was true at the time of the valid command, i.e. tied low. For terminals acting only as RTs, the

signal DBCACC should be tied high (inactive), and the signal DBCREQ should be ignored and left

unconnected.

Use of the Busy Status Bit

The Busy Bit is used by the subsystem to indicate that it is not ready to handle data transfers either to or

from the RT.

The RT sets the bit to logic one if the BUSY line from the subsystem is active low at the time of the second

falling edge of INCLK after INCMD goes low. This is shown in Figures 14 and 20. Once the Busy bit is set,

the RT will stop all receive and transmit data word transfers to and from the subsystem. The data transfers

in the Synchronize with data word and Transmit Vector word mode commands are not affected by the Busy

bit and will take place even if it has been set.

It should be noted that a minimum of 0.5 µs subaddress decoding time is given to the subsystem before

setting of status bits. This allows the subsystem to selectively set the Busy bit if for instance one

Similar Part No. - ACT3492

Manufacturer	Part #	Datasheet	Description
Active-Semi, Inc	ACT30	265Kb / 10P	High Performance Off-Line Controller ActiveSwitcher??IC Family Rev 5, 05-Jun-09
Advanced Crystal Techno...	ACT3000	158Kb / 2P	TCXOs and VCTCXOs housed in a variety of Surface Mount and Through Hole packages 10/08/04
	ACT303K	59Kb / 3P	true one-port, surface-acoustic-wave (SAW) resonator SEPT 04
	ACT303K/303.875/TO39	59Kb / 3P	true one-port, surface-acoustic-wave (SAW) resonator SEPT 04
Active-Semi, Inc	ACT30AHT	265Kb / 10P	High Performance Off-Line Controller ActiveSwitcher??IC Family Rev 5, 05-Jun-09

More results

Similar Description - ACT3492

Manufacturer	Part #	Datasheet	Description
Aeroflex Circuit Techno...	CT19901	232Kb / 29P	MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control
	CT1995	277Kb / 25P	MIL-STD-1553B Remote Terminal, Bus Controller, or Passive Monitor Hybrid with Status Word Control
	CT2565	356Kb / 31P	CT2565 Bus Controller, Remote Terminal and BUS Monitor FOR MIL-STD-1553B
	CT2561	103Kb / 9P	CT2561 Bus Controller, Remote Terminal and BUS Monitor FOR MIL-STD-1553B
	CT1999	259Kb / 25P	CT1999 Remote Terminal and/or Bus Controller for MIL-STD-1553B
Actel Corporation	1553BBC-XX	225Kb / 30P	Core1553BBC MIL-STD-1553B Bus Controller
Dynex Semiconductor	MA3690	426Kb / 41P	1553B Bus Controller/Remote Terminal
Tyco Electronics	DK-621-0912-S	129Kb / 5P	Data Bus (MIL-STD-1553B) Components
Tyco Electronics	D-500-0463-612	339Kb / 5P	Data Bus (MIL-STD-1553B) Components Revised 12-03
List of Unclassifed Man...	UT1553B	1Mb / 52P	BCRT Bus Controller/Remote Terminal/Monitor

More results

ACT3492 Datasheet(PDF) 7 Page - Aeroflex Circuit Technology

ACT3492 Datasheet(HTML) 7 Page - Aeroflex Circuit Technology

Similar Part No. - ACT3492

Similar Description - ACT3492

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

Datasheet Download

Link URL