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eroflex circuit t echnology ? data bus modules for the future ? scdct2565 rev b 8/10/99 bus controller, remote terminal and bus monitor features n second source compatible to the bus-65600 n rtu implements all dual redundant mode codes n selective mode code illegalization available n 16 bit microprocessor compatibility n bc checks status word for correct address and set flags n rtu illegal mode codes externally selectable n 16 bit processor compatibility n dma handshaking for subsystem message transfers n mil-prf-38534 compliant circuits available n desc smd #5962?88585 pending n packaging ? hermetic metal ? 78 pin, 2.1" x 1.87" x .25" plug-in type package ? 82 lead, 2.2" x 1.61" x .18" flat package general description the ct2565 is a dual redundant mil-std-1553 bus controller (bc), remote terminal (rt), and bus monitor, (bm) bus packaged in a 1.9" x 2.1" hermetic hybrid. it provides all the functions required to interface a mil-std-1553 dual redundant serial data bus transceiver, (aeroflex's act4487 for example) and a subsystem parallel three-state data bus. utilizing a custom monolithic ic, the ct2565 provides selectable operation as a bus controller, remote terminal or a bus monitor (bm). the ct2565 is compatible with most processors. it provides a 16 bit three-state parallel data bus and uses direct memory access (dma type) handshaking for subsystem transfers. all message transfer timing as well as dma and control lines are provided internally. subsystem overhead associated with message transfers is therefore minimized. interface control lines are common for both bc and rt operation. the ct2565 features the capability for implementing all dual redundant mil-std-1553 mode codes. in addition, any mode code may (optional) be illegalized through the use of an external (200ns access time) prom. complete error detection capability is provided, for both bc and rtu operation. error detection includes: response time-out, inter message gaps, sync, parity, manchester, word count and bit count. the ct2565 complies with all the requirements of mil-std-1553. the hybrid is screened in accordance with the requirements of mil-std-883 and operates over the full military temperature range of -55c to +125c. ct2565 for mil-std-1553b f i e i d c e r t a e r o f l e x l a b s i n c . iso 9001 circuit technology www.aeroflex.com
aeroflex circuit technology 2 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 b u s g r n t b u s r e q s o m b u s a c k i n c m d e o m o e c s w r c h a / c h b b c s t a r t m s g e r r l o o p e r r l w o r d s t a t e r r s t a t e n h s f a i l n b g r n t b i t e n n o d t a d r i n c b s c t r c v t i m e o u t i / o l o g i c b u f f e r s b u f e n a i / o 0 - i / o 1 6 l m c w c 0 - w c 4 i l l c m d t / r s e r r e q d b a c c e p t s s b u s y s s e r r s s f l a g d a t a b u f f e r s r e m o t e t e r m i n a l l o g i c b u s c o n t r o l l e r l o g i c d a t a b u s s t a t u s i n p u t s m o d e c o d e c o n t r o l c h b c o n t r o l c h a e n c o d e / d e c o d e c h b e n c o d e / d e c o d e t x d a t a a t x i n h a r x d a t a a r x d a t a a t x d a t a a r t a d d r p a r i t y c h e c k e r t x d a t a b t x i n h b r x d a t a b r x d a t a b t x d a t a b r t a d d r r t a d d r r t a d r 2 r t a d r 0 r t a d r 4 r t a d r 3 r t a d r 1 r t a d r p c o n t r o l b u s f i g u r e 1 ? c t 2 5 6 5 b l o c k d i a g r a m 1 2 m h z m t r t / b c t e s t o u t t e s t i n c h a c o n t r o l i / o b u s e n r / w
aeroflex circuit technology 3 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 general the ct2565 uses a custom cmos asic for protocol logic and i/o buffering to provide low power dissipation in its small package. the ct2565 performs a continuous on-line built-in-test (bit); in this test the last transmitted word of each message transfer is wrapped around through the active receiver channel and verified against the captured encoded word. a user-defined loop test under subsystem control can also be implemented. numerous error flags are provided to the subsystem including message error, status error, response time out and loop test error. an external 12 mhz, ttl clock connected to pin 39 is required. where appropriate, references to signal names and their associated pin numbers for the 78 pin ddip package are made throughout this document. for flatpack model pin numbers, refer to table 10. bc/rtu/mt initialization the ct2565 provides bc, rtu, and mt operating modes. the operating mode if dynamically selectable through two static control inputs as listed in table 2. it is recommended that a master reset signal be issued (80ns min) prior to mode selection to clear the internal registers. mil-std-1553 word types figure 2 illustrates the three mil-std-1553 word types: command, data, and status. values at nominal power supply voltages unless otherwise specified parameter value units logic v ih 2.0 min v v il 0.8 max v v oh 3.7 min v v ol 0.4 max v i ih 100 max a i il -0.4 max ma i ol * 1.2 max ma i oh * 0.4 max ma c in (f = 1mhz) 20 max pf c out (f = 1mhz) 20 max pf power supply +5vdc tolerances 10 max % supply current 50 typ (70 max) ma internal decoupling 1.5 typ f temperature range operating (case) - 55 to +125 c storage - 65 to +150 c physical characteristics size 78 pin ddip 1.9 x 2.10 x 0.25 (48.30 x 53.34 x 6.35) in (mm) 82 pin flatpack 1.6 x 2.19 x 0.15 (40.64 x 55.63 x 3.81) in (mm) weight 1.7 (48) oz (g) * i ol and i oh parameters are indicated for all logic outputs except data bus (db0 ? db15) which are 5ma for both parameters. table 1 ? ct2565 specifications
aeroflex circuit technology 4 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 dma-type handshake all bc and rt word transfers are preceded by a request-grant-acknowledge format dma handshake procedure. timing information is provided in bc, rtu and mt sections. in mt mode, the 1553 transmission is transferred along with an identification word using a single dma handshake containing two memory-write operations. the dma format requires that the subsystem provide a bus grant ( busgrnt pin 45) low within a timeout period. note that busgrnt should be set to logic "1" before another bus request ( busreq ) is issued. memory read/write with the single exception of an rt command word transfer, all subsystem transfers take the form of a static memory read or write. a low pulse on both the chip select ( cs ) and output enable ( oe ) or a low pulse on cs and write enable ( we ) (pins 17, 18 and 44 respectively) indicates data is valid on the parallel data bus for the duration of the pulse. the rising edge of cs triggers an address increment ( adrinc pin) low output pulse used to increment the subsystem memory address for successive transfers. bc operation in the bc mode, the ct2565 initiates all mil-std-1553 data and control message transfers. figure 3 details specific message transfer flow and table 3 lists subsystem memory allocation. the subsystem, or host processor, must provide a ct2565 protocol control word (see figure 4) and mil-std-1553 command and data words. the ct2565 will transfer the rtu status response and provide message transfer validation during an active transfer. all parallel word transfers occur in the form of a dma (request-grant-acknowledge) handshake with memory read or operation as shown in figures 5 and 6. command transfer in the bc mode pulse bcstart (pin 41) low. following the pulse, the ct2565 will initiate a dma handshake and memory read for; the control, word, command word(s) and up to 32 data words. no handshake timeout is enforced in the bc mode (ct2565) remains idle during busreq to busgrnt ), however 1553 protocol must be maintained. note that commands are named from the bc's point-of-view (for example, a transmit cmd indicates the addressed rtu must transmit data). bit times 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 command wd 5 5 5 1 sync remote terminal t/r subaddress data word p address mode count/mode code data word 16 1 sync data p status word 5 1 1 1 3 1 1 1 1 1 1 sync remote terminal reserved address parity terminal flag dynamic bus control acceptance message error instrumentation subsystemflag service request busy note: t/r ? transmit/receive, p ? parity broadcast command rcvd figure 2 ? mil-std-1553 word types mode rt/ bc (pin 1) mt (pin 2) bc 0 1 rt 1 1 mt 0 0 table 2 ? operating modes
aeroflex circuit technology 5 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 loop test upon receipt from the subsystem, the last word to be transmitted within a given message transfer (command or data word) is stored in a ct2565 internal register. as this word is transmitted to the 1553 bus, it is looped back through the active receiver channel for auto-bc, short loop verification. a looperr (.5us typ) low pulse indicates a mismatch between the stored and looped word. the ct2565 also initiates a handshake with a memory write to the subsystem for user-defined, "long loop" (subsystem, ct2565, subsystem) verification. note that both short and long loop testing are initiated for all transfers (on the last word transmitted to 1553). subsystems response to use long loop test is to compare the loaded word to what was looped back into memory. receive transmit control word control word receive command transmit command data 1 looped command word ? rtu status ? data 1 last data ? looped data word ? rtu status last data table 3 ? bc memory allocation 15 8 0 not used bus channel a/ b not used mask broadcast bit not used mode code broadcast rt-rt bit definition bus channel a/b when logic "1" transmits over 1553 bus a. when logic "0" transmits over 1553 bus b (see note) mask broadcast bit always set to "0" mode code command word count field signifies mode code type broadcast multiple rtu?s addressed, no status word expected rt-rt when set, rtu(b) transmits, rtu(a) receives. both rtu status words are validated and sent to subsystem. note: messages-transmission (routing) status pin (pin 16, chan a/ b ) becomes active after loading the control word and command word respectively. the signal is cleared by reset or eom low. figure 4 ? bc control word
aeroflex circuit technology 6 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 data words rx cmd long loop from rt status handshake (dma) memory read data word from ssiu yes data to 1553 yes no short loop long loop increment mem addr no no memory read increment mem addr no rt status from more data yes yes yes yes no memory read memory write memory write msgerr timeout staterr to ssiu status word (dma) handshake data word to ssiu end of message pulse stop cmd word to 1553 from ssiu control word increment mem addr output from ssiu command word handshake (dma) handshake (dma) cmd word to 1553 start bc operation control & command words no a a to ssiu status word memory write staterr short loop more data from status rt msgerr timeout handshake (dma) figure 3 ? bc message transfer flow notes: (1) steps marked with " ___" indicates operation is transparent to user. (2) steps marked with " ___" indicates user interaction required.
aeroflex circuit technology 7 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 rtu response the addressed rtu(s) must respond (to non-broadcast commands) within a timeout period as shown in figures 7, 8, and 9. figures 10 and 11 illustrate the bc mode code timing. status and data words received from the 1553 port are transferred to the subsystem via a handshake and memory write operation for each (see message length checking). bc status/error handling message transfer errors are indicated using the timeout , msgerr , looperr and staterr bc status outputs (pins 4, 30, 46 and 68 respectively). additional error detection methods include user evaluation of status, data and (long) loop words and/or use of the 1553b dual redundant mode codes. note that certain error conditions not reflected in the current status word (sw) can occur; broadcast cmd rt-status and post rt status response may be accessed via the transmit status word mode command. transmit bit word. additional status informa tion is generated by an rtu (ct2565 for each transfer in the form of a bit word). this word may be accessed by the bc using the transmit b-i-t word mode command. see rtu error handling and mode code sections). message length checking. the bc stores the command word, word-count field in an internal register. by decrementing this register following each data word transfer (see bc memory read/write timing), the bc can detect an incorrect message length. for a description of the possible bc error, indicators occurring during each stage of message transfer read from left to right in table4. for a description of the possible causes of errors within a transfer, read from right to left. transfer/condition description error signal pin control/command word 1 handshake failure memory read by bc subsystem. no response to bus request within timeout period. bc waits for grant (no 1553 timing error) - looped word short loop failure long loop failure looped back through receiver. received word 1 last xmitted word. dma/write looped word to subsystem. looperr user defined 46 - rt-rt status-rt1, data, status-rt2 response to follow receive, transmit, commands. (see definitions in status/data word below) - status word no status received within 15.5s nodt timeout timeout eom 4 57 rt address mismatch command rtu address 1 status word rtu address staterr 68 error flag(s) set status word response from rt: error condition staterr 68 broadcast received bit set response to transmit status word mode command may allow this, all others error. broadcast mask not set (see bc control word) staterr 68 data word handshake failure transmit command receive command no subsystem response to bus request. data lost: word count fails. 1553 transmission gap. bc waits for grant. msgerr status word response: staterr 30 68 data received from rtu less than word count greater than word count transmit command (rtu response) more data received than requested. msgerr and eom msgerr and eom 4 30 data after status set (all extra words) transmit command: data words received after status to subsystem. dma/memory write (for each) - format error - msgerr 30 notes: (1) looperr is a .5s pulse which occurs near dma handshake for loop back word. (2) timeout is a 40/160ns pulse which occurs 19.5s 0.5s after the mid-bit parity of the last word onto the bus. (3) staterr is a 120/166ns pulse which occurs during the status word dma handshake. (4) msgrr is a 40/160ns pulse which occurs approximately 100ns before incmd goes high. it is triggered by nodt going inactive (i.e., low word count). table 4 ? bc error handling
aeroflex circuit technology 8 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 hsfail (5) busack ( 59 ) busgrnt (45) busreq (19) t 4 t 3 t 2 t 1 figure 5 ? bc handshake timing symbol description min max units t1 busreq pulse width 867 1667 ns t2 busreq to busgrnt delay 0 800 ns t3 busgrnt pulse width 166 - ns t4 busgrnt to busack delay 50 200 ns tri-state memory read adrinc (49) memory write data valid data valid d0 - d15 t 4 t 3 t 2 t 5 t 6 t 10 t 9 t 8 t 9 t 7 t 1 t 5 t 6 cs (17) busack (59) wr (44) oe (18) cycle symbol description min max units read t1 busack to oe delay - 25 ns t2 oe to cs delay - 25 ns t3 data setup time - 250 ns t4 cs ( oe ) pulse width 650 680 ns t5 cs to adrinc delay - 25 ns t6 adrinc pulse width 80 166 ns write t7 busack to wr delay - 378 ns t8 wr to cs delay - 25 ns t9 cs and wr pulse width 150 175 ns t10 data valid setup 100 - ns figure 6 ? bc read/write timing
aeroflex circuit technology 9 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 outputs eom ( 57 ) staterr (68) lword (29) incmd (9) ( cs , oe , adrinc ) d0 - d15 mem-read (req , grnt , ack) handshake bc start (41) 1553 bus nodt (71) ( cs , wr , adrinc ) mem-write stat rt a p cmd rt a p data p cha /chb latched 200ns 5.50.5s 7.50.5s 440.5s 5.5s typ 5.50.5s 7.50.5s 240.5s 43.50.5s 10.750.75s 200 500 ns 166 332 ns 120 166 ns 330 700 ns 50 200 ns 2s 166s 4s loop stat cmd clt stat data notes for figures 7-9 t/r and hsfail are static at logic "1" in bc mode. all timing is typical unless otherwise noted. figure 7 ? bc receive one word command timing
aeroflex circuit technology 10 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 outputs eom ( 57 ) staterr (68) lword (29) incmd (9) ( cs , oe , adrinc ) d0 - d15 mem-read (req , grnt , ack) handshake bc start (41) 1553 bus nodt (71) ( cs , wr , adrinc ) mem-write cmd rt a p stat rt a p data p cha /chb latched 200ns (a) 7.50.5s (b) (b) 50.5s 200.5s 300.5s 10.750.75s 200 500 ns 40 160 ns 120 166 ns 330 700 ns 50 200 ns 166s stat cmd clt data loop 150ns (nom) 100ns mess err. ex: low wd count (a) 5.50.5s 200.5s figure 8 ? bc transmit one word command timing eom ( 57 ) staterr (68) lword (29) incmd (9) ( cs , oe , adrinc ) d0 - d15 mem-read (req , grnt , ack) handshake bc start (41) 1553 bus nodt (71) ( cs , wr , adrinc ) mem-write cmd rt a r x p rt b t x p 7.50.5s 120 166 ns 330 700 ns 2s data cmd ctl stat loop stat rt b p data p stat rt a p stat cmd 7.50.5s 7.50.5s 5.50.5s 150ns (nom) 5.50.5s 200 500 ns 50.5s 5.50.5s figure 9 ? bc rt-rt transfer timing
aeroflex circuit technology 11 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 cmd rt a p stat rt a p data lcmd p ctl cmd loop stat lcmd eom ( 57 ) 900ns 5.00.5s incmd (9) lword (29) d0 - d15 1553 bus busreq (19) adrinc (49) 80/166ns 70/80s 400/500ns figure 10 ? bc mode code transmit last command (10010) timing cmd rt a p ctl cmd loop stat eom ( 57 ) 900ns incmd (9) lword (29) d0 - d15 1553 bus busreq (19) adrinc (49) 80/166ns 50/80sec 400/500ns figure 11 ? bc mode code transmit status word (00010) timing stat rt a p 40/60sec notes: all timing is typical unless otherwise noted. rtu operation each rtu is assigned a unique address on the 1553 bus. it processes commands issued by the bc to its address or through broadcast commands. upon receipt of a valid command in the rtu mode, the ct2565 will attempt to (1) transfer 1553 data received to the subsystem, (2) read data from the subsystem for transmission on the 1553 bus, (3) transmit status information to 1553, or (4) set status conditions. all data block transfers are accompanied by a 1553 status word. figure 12 details a rtu single message transfer. rtu address rtu address pins 33-34 and 72-74 and address parity pin (odd parity) should be programmed to a unique rtu (1553) address. these inputs have internal pull-ups and will default a high state if left unconnected. the ct2565 will not respond if odd parity is compromised (see error handling). rtu initialization initialize the ct2565 as an rtu per table 2. upon receipt of valid command word from the serial bus (rtu addressed or broadcast cmd), the ct2565 will pulse nbgrnt (new bus grant) pin 42 low.
aeroflex circuit technology 12 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 handshake ( dma ) increment mem addr output stop rt-rt stop stop stop stop stop end of message pulsed illegalized cmd ? more data? ssu busy rx cmd no a yes data from 1553 word validation staten pulsed status to 1553 status to 1553 word validation status to 1553 handshake (dma) handshake (dma) data to 1553 status to 1553 short loop short loop hs fail increment mem addr output more data? hs fail staten pulsed yes yes yes yes yes data expected no no no no no yes yes hs fail som pulsed rt addr word count latched t/ r bit latched mode code pulse (mode code only) rt-rt txfer staten pulsed memory read data word from ssiu memory write data word to ssiu no a ? cmd word received from 1553 command word notes: (1) steps marked with " ___" indicates operation is transparent to user. (2) steps marked with " ___" indicates user interaction required. data word(s) figure 12 ? rtu single message transfer flow diagram
aeroflex circuit technology 13 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 mode code illegalization (optional) the word count and tx/ rx pins will be latched 800ns (typ) after the falling edge of nbgrnt (see figure 13, rtu command word handling). table 5 lists the ct2565 pins associated with mode code illegalization. if the current command is a mode code, lmc (pin 55) will go high. mode codes can be illegalized, using an external prom (<200ns access time recommended), by setting illcmd low after the nbgrnt flag. this will set the message error (status word) and illegal mode code (bit word) bits followed by transmission of the status word. using the method, mode commands can be "auto-screened" without interrupting subsystem operation. for a complete list of mode codes, refer to table 8. table 5 ? mode code illegalization pin # symbol description 51 wc0 word count lsb 12 wc1 word count 1 52 wc2 word count 2 13 wc3 word count 3 53 wc4 word count msb 15 t/ r tx/ rx note: a word count field of all 0?s indicates 32 data words; all 1?s = 31 words. sym description min typ max units illegalize t1 nbgrnt pulse width 151 - 181 ns t2 nbgrnt to lmc delay 500 - 667 ns t3 lmc to wc-t/ r latch - 200 - ns t4 lmc to illcmd latch - - 333 ns legal t5 nbgrnt to incmd delay - 1.0 1.5 s t6 busack to som delay - 166 - ns t7 som pulse width - 166 - ns t8 cmd valid setup 60 - 100 ns status inputs t9 nbgrnt low to status latch - - 3 s note: memory read/write signals cs , oe , and adrinc remain static at logic "1". figure 13 ? rtu command word handling/status inputs nbgrnt (42) status inputs busack (59) lmc (55) busreq (19) dbaccept , ssflag , svcreq , sser and ssbusy inputs latched cmd valid latched until next valid command word received valid until next valid command word received t 1 t 2 t 3 t 5 t 6 t 7 t 8 t 9 t 4 d0 - d15 incmd (9) som (78) illcmd (48) wc 0-4 t/ r (15)
aeroflex circuit technology 14 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 transfer/condition description error signal pin command word invalid word format invalid command (format error) sync, bit count invalid. operation disagreement (e.g. broadcast and transmit bits set) none; input ignored msgerr (also; sw bit) - 30 handshake failure busreq to busgrnt timeout hsfail, suppress som, continue 5 78 illegal mode command subsystem set illcmd (pin 48). sw message error bit set rt-rt transfer response timeout address mismatch (transmit) command to status word time. transmit command address 1 status word address. timeout (transmitting rt) (also; msgerr bit) msgerr (receiving rt) (also; msgerr bit) 4 30 data word handshake failure transmit command receive command number transmitted (2) busreq to busgrnt timeout (continue) (message terminated) low data word-count received. high data word count hsfail (1) continue message transfer incmd high, eom msgerr (3 ) (sw bit) msgerr after validation (no transfer) sw and bit- word also set. 5 9,57 30 30 loop word short loop long loop looped back through receiver. received word 1 to last xmitted 1553 word. (bc only) looper (also sets ter- flag bit). 46 notes: (1) the hsfail low output is reset (high) at the start of the next message transfer ( nbgrnt low). (2) the subsystem can use the status input pins (sw) to report incorrect word count type errors. (3) msgerr set 7.5s after last mid parity bit of last data word. table 6 ? rtu error handling rtu commands a command word transfer will be initiated by the ct2565 after the rising edge of nbgrnt (see figure14). in order to allow the command word to be stored in user-defined memory space (separate from data), no memory write operation ( cs , wr , adrinc outputs) will be initiated following the usual dma-type handshake; a start of message (pin 78: som low) pulse indicates that the cmd word is currently valid on the data bus. note that commands are named from the bc point-of-view (i.e., a transmit cmd dictates that the addressed rtu must transmit data). transmit cmd (rt-bc) if the subsystem is available (pin 47: ssbusy high): following transmission of the status word, the ct2565 will initiate a handshake/memory-read respectively for the total number of (data) words defined by the command word-word count field. figure 15 shows the rtu read/write timing. note that possible data word transfer and short-loop test errors will be reflected in the following status word/bit word. a low on the ssbusy input will set the corresponding status word flag, and no data transfer will be requested ( busreq low) following transmission of the status word. receive cmd (bc-rt). a dma handshake will be initiated for each word received over the 1553 data bus (see figure 16). if successful, the respective handshake will be followed by a corresponding memory write. transfer errors such as handshake timeout or ss busy will not terminate transfer attempts for the remaining data words, error flagging or status word transmission. rtu(b)-rtu(a) (transmit/receive). an rt-rt transfer will appear to both rtu subsystems as a standard transmit or receive command except: (1) transmission of the data block will not be continuous with that of the receive cmd, and, (2) upon detection of a command-sync field following the receive cmd, rtu(a) will recognize an rt-rt transfer and store the transmit cmd-address field for comparison with the address field of the following (rtu(b) status) word (see figures 17 and 18). if a mismatch is detected, rtu(a) will issue a message error. the transmitting rtu will respond as in an rt-bc transmit cmd. rtu status/error handling message transfer errors are indicated using the timeout , hsfail , msgerr and looperr rtu-status outputs (pins 4, 5, 30 and 46 respectively). additional error detection mechanisms available include status input manipulation (below) and evaluation of the status and bit words (see bit word). table 6 describes error handling mechanisms related to each stage in a message transfer (reading left to right) as well as noting errors associated with a specific ct2565 status output (reading right to left). short loop test. the last word to be transmitted in a given message transfer (status word, bit word or data word) is stored in a ct2565 internal register. as this word is transmitted to the 1553 bus, it is "looped back" through the active receiver channel for auto-rtu, "shortloop" verification. a looperr low pulse indicates a mismatch between the stored and looped words. note that short loop testing is initiated for all rtu transfers except a broadcast transfer.
aeroflex circuit technology 15 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 hsfail (5) busack ( 59 ) busgrnt (45) busreq (19) t 3 t 2 t 1 symbol description min max units t1 busreq pulse width 667 - ns t2 busgrnt delay cmd word tx data word rx data 0 0 0 1.5 15.5 2.33 s s s t3 busgrnt to busack delay 40 166 ns note: hsfail will go low following a busreq to busgrnt timeout. figure 14 ? rtu handshake timing figure 15 ? rtu read/write timing adrinc ( 49 ) oe (18) cs (17) d0 - d15 busack (59) wr (44) valid valid t 7 t 4 t 8 t 9 t 10 t 5 t 5 t 6 t 3 t 2 t 1 t 4 memory write memory read cycle symbol description min typ max units read t1 busack to oe delay - - 25 ns t2 oe to cs delay - - 25 ns t3 data setup time - - 250 ns t4 cs , oe and busack pulse width - 500 - ns t5 cs to adrinc delay - - 25 ns t6 adrinc pulse width 80 - 166 ns write t7 busack to cs delay - - 225 ns t8 wr to cs delay - - 25 ns t9 cs and wr pulse width 150 166 180 ns t10 data valid setup prior to leading edge of wr 60 - 100 ns
aeroflex circuit technology 16 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 figure 16 ? rt receive command timing eom ( 57 ) nrgrnt (42) incmd (9) d0 - d15 (req , grnt , ack) handshake bcstrcv (75) 1553 bus nodt (71) ( cs , wr , adrinc ) mem-write stat rt a p cmd rt a rcv p data (16 bits) p 3.9s 10.750.75s note: all timing is typical unless otherwise noted. som ( 78 ) staten (3)/ buffena (58) cha /chb (16) wc 0-4 t/ r (15) ref 7.50.5s 5.50.5s 4.50.5s 7.50.5s 3.40.5s 0.5s 1.5s 3.20.5s 5.50.5s 4s 400ns 667ns 166ns cmd data stat use of status word the status word may be captured by the subsystem as it is transmitted to the 1553 port by pulsing bufena (pin 58) low during staten (pin 3: 520ns low pulse). data becomes valid approximately 50ns after the falling edge of bufena . this corresponds with all non-broadcast message transfers and the transmit status word mode command. note that the status word may be transmitted prior to an error condition (see transmit cmd). these conditions will be indicated in the "next" status word and may be monitored if the bc requests the sw before it is altered (see mode commands). subsystem control the ct2565 allows the subsystem total control over the status word flags using the inputs indicated in table 7. bit word the bit word (built-in-test) becomes available in response to a transmit bit word mode command and provides additional status information (see figure 19) to that provided by the status word. the subsystem may capture the bit word on the parallel data bus by pulsing bufena (pin 58) low during biten (pin 43: approximately 520ns low pulse). data becomes valid approximately 50ns after the falling edge of bufena . like the status word, the bit word cannot be altered by the subsystem. pin # symbol description 6 dbaccept rt accepts bc operation responsibility (see table 2). 7 ssflag transmitted data may be invalid sets ssflag bit. 8 svcreq service request; see transmit vector mode command. 10 sser rtu fault exists: sets terminal flag bit. 47 ssbusy subsystem cannot service 1553 request at this time. 48 illcmd mode command subsystem illegalization: sets msgerr bit, doesn?t suppress status word. table 7 ? subsystem control of rt-status
aeroflex circuit technology 17 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 eom ( 57 ) nrgrnt (42) incmd (9) d0 - d15 (req , grnt , ack) handshake illegalize 1553 bus nodt (71) ( cs , oe , adrinc ) mem-read rt a t x p stat rt a p data (16 bits) p 10.750.75s som ( 78 ) staten (3)/ biten (43) cha /chb (16) wc 0-4 t/ r (15) 1.00.2s 5.50.5s 4.50.5s 7.50.5s 3.40.5s lmc illcmd 1.5s 5.50.5s 4s 165ns 667ns 166ns cmd stat data 7.50.5s cmd 50020ns 50020ns figure 17 ? rt transmit command timing notes: (1) all timing is typical unless otherwise noted. (2) biten only occurs when xmit bit wd mode code command is received (handshake and read/write signals are not generated in this case).
aeroflex circuit technology 18 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 figure 18 ? rt-rt transfer timing eom ( 57 ) nrgrnt (42) incmd (9) d0 - d15 (req , grnt , ack) handshake illegalize nodt (71) ( cs , we , adrinc ) mem-read rt a rcv p rt b t x p stat rt b p data p 10.750.75s som ( 78 ) staten (3)/ biten (43) 4.50.5s 7.50.5s 3.40.5s illcmd 1.5s 5.50.5s 400ns 330ns cmd stat data 7.50.5s 500ns cmd cmd stat rt a p (16) bits lmc timeout ( 4 ) 5.50.5s 450ns 19.5s 2.3s 400ns (no timeout) (timeout error) rcv 1553 bus 10.750.5s 7.50.5s ref note: all timing is typical unless otherwise noted. 15 8 7 0 set to "0" set to "0" chan b xmitter timeout chan a xmitter timeout chan b loop test failure chan a loop test failure chan b xmitter shutdown chan a xmitter shutdown non-mode broadcast cmd to xmit message high word count message low word count illegal mode code or illegal broadcast with mode code mode code or t/ r error chan a/b loop test failure handshake failure chan a/b xmitter timeout notes: (1) bits 0-2 and 10-13 are latched and only cleared by a mode reset command or a master reset . (2) bits 3-7 are cleared at the start of each new message and updated at the end of the message. they reflect the present command word. (3) bits 8-9 are set by the mode command for transmitter shutdown and are cleared by the mode command for override transmitter shutdown, reset rt or a master reset . figure 19 ? bit word
aeroflex circuit technology 19 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 name definition gap time nodt low time. 2mhz clock allows 500ns increments to 128s (remains static at ff on overflow). word transfer logic "1" indicates successful transfer to subsystem. word transferred indicates successful transfer (see bit 7) valid word reset (1) indicates manchester error, parity error, low bit count and/or status sync field. command sync logic "1" indicates command or status sync field. logic"0" indicates data sync. chan a/ b logic "1" if word received on 1553 bus channel b. word gap set (0) if current word was received at least 2s after receipt of previous word (parity to mid-sync). note: subsystem should clear entire memory prior to start of mt operation. figure 20 ? identification word mt operation in the mt mode, the ct2565 captures all valid transmissions on both channels of the 1553 bus, allowing the user to monitor bus activity. each word is transferred to the subsystem along with an identification for interpretation of the 1553 data stream. mt initialization initialize the ct2565 for mt operation per table 2. the ct2565 will remain in an idle state until bcstart (pin 41) is pulsed low. figure 21 illustrates mt operation. valid words received by the ct2565 are transferred to the subsystem along with an identification word by a single dma handshake with two memory-write operations shown in figure 22, mt transfer timing. since the decoder will reject words based on sync field errors and/or errors in the first 2 non-sync bits, these words will not be processed further (i.e., the subsystem will receive no indication of the receipt of this word). yes no yes error ? increment mem addr increment mem addr identification word memory write dma nodt low sync + 2 bits decoder check activity 1553 bus start mt operation (start-up only) initialization start 1553 input memory write 15 8 7 0 gap time word transfer logic "1" logic "1" valid word command sync ch a/ b word gap set to "0" figure 21 ? mt operation flow chart notes: (1) steps marked with " ___" indicates operation is transparent to user. (2) steps marked with " ___" indicates user interaction required.
aeroflex circuit technology 20 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 simultaneous transmission transmissions appearing simultaneously on alternate 1553-bus channels will be captured by ct2565 sequentially providing that each busreq is answered by the subsystem with a busgrnt within the handshake timeout period. reset signal pulsing reset low will suspend mt operation by (1) incmd goes high (eom goes low on the rising edge) and (2) the ct2565 enters an idle state. mt operation may be restored by pulsing bcstart low (above) or another mode of operation may be selected (see table 2). handshake failure note that a handshake failure will abort the current transfer. monitoring will resume upon receipt of a valid word on the 1553 bus. mode codes nine of the 13 available, dual redundant mode codes are handled by the ct2565 without user intervention. of the four remaining codes, dynamic bus control and synchronize (no data) require subsystem notification. the remaining two mode codes, transmit vector word and synchronize (with data) involve data transfer with the subsystem. mode command illegalization and handling are detailed in the rtu operation section and listed in table 8. d0 - d15 cs (17) data valid wr (44) busack (59) busgrnt (45) busreq (19) adrinc (49) t 7 t 5 t 4 t 3 t 2 t 1 t 6 t 6 t 8 t 6 t 8 t 9 t 10 id-word valid figure 22 ? mt transfer timing cycle sym description min typ max units handshake t1 busreq to busgrnt delay 0 - 800 ns t2 busgrnt pulse width 166 - - ns t3 busgrnt to busack delay ? - ? ns write only t4 busack to wr delay 320 330 370 ns t5 wr to cs time - - 25 ns t6 wr and cs pulse width 150 166 175 ns t7 data valid setup - - 50 ns t8 cs to adrinc delay - - 25 ns t9 arinc pulse width 80 - 166 ns t10 id word valid setup - - 100 ns
aeroflex circuit technology 21 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 dynamic bus control (00000) message sequence = dbc * status the ct2565 responds with status. if the subsystem wants control of the bus, it must set dbacc within 2.5us after nbgrt. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error (bit word). 5. broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code (bit word). synchronize without data word (00001) message sequence = sync * status the ct2565 responds with status. if sent as a broadcast, the broadcast receive bit will be set and status response suppressed. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error (bit word). transmit status word (00010) message sequence = transmit status * status the status and bit word registers are not altered by this command and contain the resulting status from the previous command. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error (bit word). 5. broadcast address. no status response. bits set: message error, broadcast received (s/w), illegal mode code, t/r error (bit word). initiate self-test (00011) message sequence = self test * status the ct2565 responds with a status word. if the command was broadcast, the broadcast received bit is set and status transmission suppressed. short-loop test is initiated on the status word transmitted. if the test fails, an rt fail flag is generated. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), t/r error (bit word). 5. faulty test. bits set: terminal flag (sw), a/b loop test fail, current 1553 bus (a or b) loop test fail (bit word). transmitter shutdown (00100) message sequence - shutdown * status this command is only used with dual redundant bus systems. the ct2565 responds with status. at the end of the status transmission, the ct2565 inhibits any further transmission from the dual redundant channe l. once shutdown, the transmitter can only be re-activated by override transmitter shutdown or reset rt commands. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error (bit word). table 8 ? mode codes
aeroflex circuit technology 22 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 override transmitter shutdown (00101) message sequence - override shutdown - status this command is only used with dual redundant bus systems. the ct2565 responds with status. at the end of the status transmiss ion, the ct2565 re-enables the transmitter of the redundant bus. if the command was broadcast, the broadcast received bit is set and sta tus transmission is suppressed. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error (bit word). inhibit terminal flag bit (00110) message sequence - inhibit terminal flag * status the ct2565 responds with status and inhibits further internal or external setting of the terminal flag bit in the status registe r. once the terminal flag has been inhibited, it can only be reactivated by an override inhibit terminal flag or reset rt command. if the c ommand was broadcast, the broadcast received bit is set and status transmission is suppressed. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), t/r error (bit word). override inhibit terminal flag bit (00111) message sequence - override inhibit terminal flag * status the rtu responds with status and reactivates the terminal flag bit in the status register. if the command was broadcast, the br oadcast received bit is set and status transmission is suppressed. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), t/r error (bit word). reset remote terminal (01000) message sequence - reset remote terminal * status the ct2565 responds with status and internally resets. transmitter shutdown, mode commands, and inhibit terminal flag commands will be reset. if the command was broadcast, the broadcast received bit is set and the status word is suppressed. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), t/r error (bit word). reserved mode codes (01001-01111) message sequence = reserved mode codes * status the ct2565 responds with status. if the command is illegalized through an optional prom, the message error bit is set and only the status word is transmitted. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), illegal mode code (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code (bit word). table 8 ? mode codes (continued)
aeroflex circuit technology 23 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 transmit vector word (10000) message sequence - transmit vector word * status vector word the ct2565 transmits a status word followed by a vector word. the contents of the vector word (from the subsystem) are enabled onto dbo-db15 with busreq after the command transfer (same as data word in a normal transmit command). error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw) high word count (bit word). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error, low word count (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error, low word count (bit word). 5. broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, (bit word). synchronize with data word (10001) message sequence - synchronize data word * status the data word received following the command word is transferred to the subsystem. the status register is then enabled and its contents transferred onto the data bus and transmitted. if the command was broadcast, the broadcast received bit is set and status trans mission is suppressed. error conditions 1. invalid command. no response, command ignored. 2. command not followed by data word. no status response. bits set: message error (sw), low word count (bit word). 3. command followed by too many data words. no status response. bits set: message error (sw), high word count (bit word). 4. command t/r bit set to one. no status response. bits set: message error (sw), t/r error, high word count (bit word). 5. command, t/r bit set to one and broadcast address. no status response. bits set: message error, broadcast received (sw), high word count, t/r error (bit word). transmit last command (10010) message sequence = transmit last command * status last command the status and bit word registers are not altered by this command. the sw contains the status from the previous command. the data word transmitted contains the previous valid command (providing it was not another transmit last command). error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error, low word count (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, (sw), illegal mode code t/r error (bit word). 5. broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code (bit word). transmit bit word (10011) message sequence - transmit bit word * status bit word the ct2565 transmits a status word followed by the bit word . when activated, biten allows the subsystem to latch the bit word on the parallel data bus. the bit word is not altered by this command; however, the next sw will reflect errors in this transmission. error conditions 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw). 3. t/r bit set to zero. no status response. bits set: message error (sw), t/r error, low word count (bit word). 4. zero t/r bit and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, t/r error, low word count (bit word). 5. broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, (bit word). table 8 ? mode codes (continued)
aeroflex circuit technology 24 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 selected transmitter shutdown (10100) message sequence - transmitter shutdown data * status the data word received is transferred to the subsystem and status is transmitted. if the command was broadcast, the broadcast received bit is set and status transmission suppressed. intended for use with rts with mor e than one dual redundant channel. error conditions 1. invalid command. no response, command ignored. 2. command not followed by data word. no status response. bits set: message error (sw), high word count, illegal mode code (bit word). 3. command followed by too many data words. no status response. bits set: message error (sw), low word count, illegal mode code (bit word). 4. command t/r bit set to one. no status response. bits set: message error (sw), illegal mode code, high word count (bit word). 5. command t/r bit set to one and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, high word count (bit word). override selected transmitter shutdown (10101) message sequence - transmitter shutdown data * status the data word received after the command word is transferred to the subsystem. if the command was broadcast, the broadcast received bit is set and status transmission suppressed. error conditions 1. invalid command. no response, command ignored. 2. command not followed by data word. no status response. bits set: message error (sw), low word count, illegal mode code (bit word). 3. command followed by too many data words. no status response. bits set: message error (sw), high word count, illegal mode code (bit word). 4. command t/r bit set to one. no status response. bits set: message error (sw), illegal mode code, high word count (bit word). 5. command t/r bit set to one and broadcast address. no status response. bits set: message error, broadcast received (sw), illegal mode code, high word count, t/r (bit word). reserved mode codes message sequence = reserved mode code (t/r = 1) * status reserved mode code (t/r = 0) * status the ct2565 responds with status. if the command was broadcast, the broadcast received bit is set and status transmission suppre ssed. error conditions (t/r = 1) 1. invalid command. no response, command ignored. 2. command followed by data word. no status response. bits set: message error (sw), high word count, illegal mode code (bit word). error conditions (t/r = 0) 1. invalid command. no response, command ignored. 2. command not followed by contiguous data word. no status response. bits set: message error (sw), high word count, illegal mode code (bit word). 3. command followed by too many data words. no status response. bits set: message error (sw), high word count, illegal mode code (bit word). table 8 ? mode codes (continued)
aeroflex circuit technology 25 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 table 9a ? pin function table (78 pin ddip) pin # symbol description 1 rt/ bc mode select input - logic "1" for rt mode, logic ?0? for bc mode. 2 mt monitor mode enable. when unit is operating as a bc, a logic ?0? will select monitor mode. 3 staten output signal in rt mode that indicates status word is being transferred on the internal bus. 4 timeout indicates no response timeout has occured during bc and rtu (rt to rt transfer). 5 hsfail output in rt mode indicating the dma transfer did not occur in time to allow proper operation on the 1553 bus. 6 dbaccept input signal used to set dbaccept bit in status register for response to a valid mode command on the 1553 bus. 7 ssflag input which controls the ssflag bit in the status register. 8 svcreq input which controls the service request bit in the status word. 9 incmd output signal indicating the rt is currently in a message transfer sequence. 10 sser input which controls the subsystem error bit in the status register. 11 testout factory test point. do not connect. 12 wc1 wc bit 1 - latched output of command word. 13 wc3 wc bit 3 - latched output of command word. 14 txinh b transmitter inhibit output for channel b. 15 t/ r output indicating t/ r bit of current command word in rt mode. 16 cha /chb output indicating current selected channel (0 = channel a). 17 cs chip select output for subsystem memory control. 18 oe output enable output for subsystem memory control. 19 busreq output signal used to initiate transfer to/from subsystem. 20 +5v +5 volt dc input. 21 db0 least significant bit - 16 bit parallel data bus. 22 db2 bit 2 of data bus. 23 db4 bit 4 of data bus. 24 db6 bit 6 of data bus. 25 db8 bit 8 of data bus. 26 db10 bit 10 of data bus. 27 db12 bit 12 of data bus. 28 db14 bit 14 of data bus. 29 lword last word output during bc mode indicates last data word of the current message transfer has been transferred on the parallel bus.
aeroflex circuit technology 26 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 30 msgerr output signal which indicates an error occurred during the current message sequence. 31 txdata a bipolar serial data output to positive input of bus transceiver. 32 rxdata a bipolar serial input from negative output of bus transceiver. 33 rtadp parity bit input for rt address. 34 rtad1 bit 1 of rt address input. 35 rtad3 bit 3 of rt address input. 36 reset system reset input - resets all inputs in module. 37 txdata b bipolar serial data output to negative input bus transceiver. 38 rxdata b bipolar serial data input from positive output of bus transceiver. 39 12mhz 12mhz ttl clock input. 40 ground signal ground. 41 bcstart cycle enable input logic "0" initiates bus controller message transfer operation. 42 nbgrnt new bus grant output from rt indicates beginning of message transfer sequence. 43 biten built in test enable output indicates rt is transferring blt word on internal 16 bit bus. 44 wr write enable output for control of subsystem memory. 45 busgrnt bus request input in response to dtreq. allows bc/ rt to transfer data to subsystem. 46 looperr loop error output. logic "0" indicates failure of loop back transmitted data. 47 ssbusy subsystem busy input for rt status word. 48 illcmd illegal command input to rt, used to block rt response to an illegal command. 49 adrinc increment output pulse. goes low at the completion of each word transfer to/from subsystem. can increment external address counter. 50 chassis frame ground electricity isolated from signal ground 51 wc0 lsb of current command word count field. 52 wc2 bit 2 of word count field. 53 wc4 bit 4 of word count field. 54 txinh a transmitter inhibit output signal for channel a. 55 lmc latched mode command. logic "1" indicates current word command is a mode code word, wc0-wc4. 56 testin factory test point. do not connect. 57 eom end of message output. logic "0" occurs when bc/ rt message is completed. 58 bufena buffer enable input, may be driven low by staten or biten if subsystem must read bit or status words. enables internal 16 bit bus onto subsystem bus. table 9a ? pin function table (78 pin ddip) (continued) pin # symbol description
aeroflex circuit technology 27 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 59 busack bus acknowledge output. low during dma handshake, in response to busgrnt . 60 db1 bit 1 of 16 bit parallel bus. 61 db3 bit 3 of 16 bit parallel bus. 62 db5 bit 5 of 16 bit parallel bus. 63 db7 bit 7 of 16 bit parallel bus. 64 db9 bit 9 of 16 bit parallel bus. 65 db11 bit 11 of 16 bit parallel bus. 66 db13 bit 13 of 16 bit parallel bus. 67 db15 bit 15 of 16 bit parallel bus. 68 staterr bc output indicates one or more bits set or address mismatch in a received status word. 69 txdata a bipolar serial data output to negative input of bus transceiver. 70 rxdata a bipolar serial data input from positive output of bus transceiver. 71 nodt no data input. logic "0" indicates the 1553 bus is idle; high means device front end is active. 72 rtad0 lsb of 5 bit rt address. 73 rtad2 bit 2 of rt address. 74 rtad4 bit 4 of rt address. 75 bcstrcv broadcast receive. logic "0" means the current command was a broadcast command. 76 txdata b bipolar serial output to positive input of bus transceiver. 77 rxdatab bipolar serial input from negative output of bus transceiver. 78 som start of message output indicates beginning of rt/ bc message transfer sequence. table 9a ? pin function table (78 pin ddip) (continued) pin # symbol description
aeroflex circuit technology 28 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 21 60 22 61 23 62 24 63 25 64 26 65 27 66 28 67 29 68 30 69 31 70 32 71 33 72 34 73 35 74 36 75 37 76 38 77 39 78 40 1 41 2 42 3 43 4 44 5 45 6 46 7 47 8 48 9 49 10 50 11 51 12 52 13 53 14 54 15 55 16 56 17 57 18 58 19 59 20 rt/ bc bcstart mt nbgrnt staten biten timeout wr hsfail busgrnt dbaccept looperr ssflag ssbusy svcreq illcmd incmd adrinc sser case gnd testout wc0 wc1 wc2 wc3 wc4 txinh b txinh a t/ r lmc chb/ cha testin cs eom oe bufena busreq busack +5 volt db0 db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db12 db13 db14 db15 (msb) lword staterr msgerr txdata a txdata a rxdata a rxdata a nodt rtadp rtad0 rtad1 rtad2 rtad3 rtad4 reset bcstrcv txdata b txdata b rxdata b rxdata b 12mhz som gnd ct2565 mil-std-1553 bus controller, remote terminal and ddip pin connection diagram, ct2565 and pinout table 9b ? ct2565 pin out description (ddip) pin # function pin # function 1 rt/ bc 40 gnd 2 mt 41 bcstart 3 staten 42 nbgrnt 4 timeout 43 biten 5 hsfail 44 wr 6 dbaccept 45 busgrnt 7 ssflag 46 looperr 8 svcreq 47 ssbusy 9 incmd 48 illcmd 10 sser 49 adrinc 11 testout 50 case gnd 12 wc1 51 wc0 13 wc3 52 wc2 14 txinh b 53 wc4 15 t/ r 54 txinh a 16 chb/ cha 55 lmc 17 cs 56 testin 18 oe 57 eom 19 busreq 58 bufena 20 + 5 volt 59 busack 21 db0 (lsb) 60 db1 22 db2 61 db3 23 db4 62 db5 24 db6 63 db7 25 db8 64 db9 26 db10 65 db11 27 db12 66 db13 28 db14 67 db15 (msb) 29 lword 68 staterr 30 msgerr 69 txdata a 31 txdata a 70 rxdata a 32 rxdata a 71 nodt 33 rtadp 72 rtad0 34 rtad1 73 rtad2 35 rtad3 74 rtad4 36 reset 75 bcstrcv 37 txdata b 76 txdata b 38 rxdata b 77 rxdata b 39 12mhz 78 som bus monitor
aeroflex circuit technology 29 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 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 rt/ bc bcstart mt nbgrnt staten biten timeout wr hsfail busgrnt dbaccept looperr ssflag ssbusy svcreq illcmd incmd adrinc sser case gnd testout wc0 wc1 wc2 wc3 wc4 txinh b txinh a t/ r lmc chb/ cha testin cs eom oe bufena busreq busack +5v db0 (lsb) db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db12 db13 db14 db15 (msb) lword staterr msgerr txdata a txdata a rxdata a rxdata a nodt rtadp rtad0 rtad1 rtad2 rtad3 rtad4 reset bcstrcv txdata b txdata b rxdata b rxdata b 12mhz som ground table 10 ? ct2565 pin out description (fp) pin # function pin # function 1 n/c 42 n/c 2 rt/ bc 43 ground 3 bcstart 44 som 4 mt 45 12mhz 5 nbgrnt 46 rxdata b 6 staten 47 rxdata b 7 biten 48 txdata b 8 timeout 49 txdata b 9 wr 50 bcstrcv 10 hsfail 51 reset 11 busgrnt 52 rtad4 12 dbaccept 53 rtad3 13 looperr 54 rtad2 14 ssflag 55 rtad1 15 ssbusy 56 rtad0 16 svcreq 57 rtadp 17 illcmd 58 nodt 18 incmd 59 rxdata a 19 adrinc 60 rxdata a 20 sser 61 txdata a 21 case gnd 62 txdata a 22 testout 63 msgerr 23 wc0 64 staterr 24 wc1 65 lword 25 wc2 66 db15 (msb) 26 wc2 67 db14 27 wc4 68 db13 28 txinh b 69 db12 29 txinh a 70 db11 30 t/ r 71 db10 31 lmc 72 db9 32 chb/ cha 73 db8 33 testin 74 db7 34 cs 75 db6 35 eom 76 db5 36 oe 77 db4 37 bufena 78 db3 38 busreq 79 db2 39 busack 80 db1 40 +5v 81 db0 (lsb) 41 n/c 82 n/c flat package pin connection diagram, ct2566 and pinout 1 2 n/c n/c n/c n/c 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 82 81 ct2565fp mil-std-1553 bus controller, remote terminal and bus monitor
aeroflex circuit technology 30 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 .100 2.100 1.500 typ lead 1 & esd designator 1.900 1.800 pin 19 pin 20 pin 59 pin 41 pin 2 .050 typ 1.650 1.870 .100 .110 pin 1 .250 .250 max pin 39 pin 40 pin 78 pin 22 pin 21 pin 60 .018 dia typ .080 .180 max .010 .002 .015 2.000 pin 42 .095 pin 41 2.200 max lead 1 & esd designator 1.610 max designator max .400 min .050 lead centers 41 leads/side (4 places) pin 82 .050 figure 23 ? plug in package outline figure 24 ? flat package outline
aeroflex circuit technology 31 scdct2565 rev b 8/10/99 plainview ny (516) 694-6700 circuit technology aeroflex circuit technology 35 south service road plainview new york 11803 telephone: (516) 694-6700 fax: (516) 694-6715 toll free inquiries: (800) the-1553 specifications subject to change without notice www.aeroflex.com/act1.htm e-mail: sales-act@aeroflex.com ordering information model number screening desc smd # package ct2565 military temperature, -55c to +125c, screened to the individual test methods of mil-std-883 - plug in CT2565-FP - flat package ct2565-001-1 per smd 5962-8858501xa plug in ct2565-001-2 5962-8858501xc plug in ct2565-201-1 5962-8858501ya flat package ct2565-201-2 5962-8858501yc flat package

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