5962H8957701ZC View Datasheet(PDF) - Aeroflex UTMC

Part Name

Description

Manufacturer

5962H8957701ZC

BCRTM

Aeroflex UTMC 

5.4 RAM Interface

The BCRTM’s RRD, RWR, and MEMCSO signals serve as

read and write controls during BCRTM memory accesses.

The host subsystem signals RD, WR, and MEMCSI

propagate through the BCRTM to become RRD, RWR, and

MEMCSO outputs to support a pseudo-dual-port. During

BCRTM-RAM data transfers, the host subsystem’s memory

signals are ignored until the BCRTM access is complete.

5.5 Legalization Bus

The BCRTM’s Manchester II encoder/decoder interfaces

directly with the1553 bus transceiver, using the TAO-TAZ

and RAZ-RAO signals for Channel A, and TBO-TBZ and

RBZ-RBO signals for Channel B.

The BCRTM also provides a TIMERON signal output and

an active channel output indicator (CHA/B) to assist in

meeting the MIL-STD-1553B fail-safe timer requirements..

BCRTM

TIMRONB

CHANNEL A CHANNEL B CHA/B

CHANNEL A CHANNEL B

TXINHA

DUAL

TRANSCEIVER

TXINHB

Figure 4. Dual-Channel Transceiver

6.0 REMOTE TERMINAL ARCHITECTURE

The Remote Terminal architecture is a descriptor-

based configuration of relevant parameters. It is composed

of an RT Descriptor Space (see figure 5) and internal, host-

programmable registers. The Descriptor Space contains

only descriptors. Descriptors contain programmable

subaddress parameters relating to handling message

transfers. Each descriptor consists of four words: (1) a

Control Word, (2) a Message Status List Pointer, (3) a Data

List Pointer, and (4) an unused fourth word (see figure 6.)

These words indicate how to perform the data transfers

associated with the designated subaddress.

RECEIVE SUBADDRESS #1

- STARTING ADDRESS

INITIALIZED BY CPU

IN THE RT DESCRIPTOR

SPACE REGISTER

RECEIVE SUBADDRESS #2

RECEIVE SUBADDRESS #31

UNUSED

TRANSMIT SUBADDRESS #1

TRANSMIT SUBADDRESS #2

TRANSMIT SUBADDRESS #31

UNUSED

MODE CODE

#’S 0 & 16

MODE CODE

#’S 1 & 17

MODE CODE

#’S 15 & 31

Figure 5. Descriptor Space

ILLEGAL BROADCAST

SUBADDRESS

ILLEGAL

SUBADDRESS

INTERRUPT WHEN

ADDRESSED

INTERRUPT WHEN

INDEX = 0

15

10 9 8 7 6

0

UNUSED I

I

I

I

INDEX

MESSAGE STATUS LIST POINTER

DATA LIST POINTER

FOR FUTURE EXPANSION

Figure 6. Remote Terminal Subaddress Descriptor

BCRTM-23

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