CT2565 Aeroflex Circuit Technology, CT2565 Datasheet

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... IC, the CT2565 provides selectable operation as a Bus Controller, Remote Terminal or a Bus Monitor (BM). The CT2565 is compatible with most µprocessors. 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 ...

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... Aeroflex Circuit Technology 2 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... Data Bus (DB0 – DB15) which are ±5mA for OL OH both parameters. 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 ...

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... DATA WORD P COUNT/MODE CODE PARITY TERMINAL FLAG DYNAMIC BUS CONTROL ACCEPTANCE SUBSYSTEM FLAG BUSY BROADCAST COMMAND RCVD data and control message Figure 3 details specific message The subsystem, or host processor, handshake SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 with ...

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... Multiple RTU’s addressed, no status word expected When set, RTU(b) transmits, RTU(a) receives. Both RTU Status Words are validated and sent to subsystem. Figure 4 – BC Control Word 5 As this word is The CT2565 also for user-defined, "long loop" 0 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... A YES RX CMD HANDSHAKE (DMA) MEMORY READ DATA WORD FROM SSIU INCREMENT MEM ADDR DATA TO 1553 YES MORE DATA NO SHORT LOOP LONG LOOP STATUS NO FROM RT YES TIMEOUT MSGERR STATERR MEMORY WRITE STATUS WORD TO SSIU YES STOP SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... Table 4 – BC Error Handling 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) ...

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... MAX UNITS 867 1667 ns 0 800 ns 166 - ns 50 200 DATA VALID MEMORY WRITE MIN MAX UNITS - 250 ns 650 680 166 ns - 378 150 175 ns 100 - ns SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... A 2µs 166µs 43.5±0.5µs 4µs DATA 7.5±0.5µs 5.5±0.5µs 44±0.5µ STAT 10.75±0.75µs 24±0.5µs LOOP STAT STAT 5.5±0.5µs 5.5µs TYP 120 166 ns SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 7.5±0.5µs 200 500 ns 166 332 ns ...

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... MESS ERR. EX: LOW WD COUNT P DATA P STAT STAT DATA STAT 7.5±0.5µs 5±0.5µs 5.5±0.5µs 200 500 ns SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 5±0.5µs 200 500 ns 100ns 40 160 ns 7.5±0.5µs 150ns (NOM) 5.5±0.5µs 120 166 ns ...

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... Error Handling). RTU Initialization All data block 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. ...

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... DATA TO 1553 SHORT LOOP END OF MESSAGE PULSED STOP 12 A YES RX CMD DATA FROM 1553 WORD VALIDATION HANDSHAKE (DMA) HS FAIL MEMORY WRITE DATA WORD TO SSIU INCREMENT MEM ADDR OUTPUT YES MORE DATA? NO STATUS TO 1553 STATEN PULSED SHORT LOOP SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... Word Count 1 WC2 Word Count 2 WC3 Word Count 3 WC4 Word Count MSB T/R TX/ CMD VALID MIN TYP MAX UNITS 151 - 181 500 - 667 - 200 - - - 333 - 1.0 1.5 - 166 - - 166 - 60 - 100 - - 3 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 LATCHED µ µs ...

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... 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 "looped back" through the active receiver channel for auto-RTU, " ...

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... MIN MAX UNITS 667 - ns 0 1.5 µs 0 15.5 µs 0 2.33 µs 40 166 VALID MEMORY READ MIN TYP MAX UNITS - - 250 ns - 500 - 166 225 150 166 180 100 ns SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... RTU fault exists: sets TERMINAL FLAG bit. Subsystem cannot service 1553 request at this time. Mode command subsystem illegalization: Sets MSGERR bit, doesn’t suppress status word. STAT 7.5±0.5µs 4.5±0.5µs 5.5±0.5µs STAT 4µs SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 valid 400ns ...

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... Figure 17 – RT Transmit Command Timing Aeroflex Circuit Technology P STAT 10.75±0.75µs 5.5±0.5µs 7.5±0.5µs 3.4±0.5µs LMC ILLCMD CMD STAT 4µs 500±20ns 667ns DATA (16 BITS 7.5±0.5µs 4.5±0.5µs 1.0±0.2µs DATA 500±20ns SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 165ns ...

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... Figure 19 – Bit Word 18 P STAT REF (16) BITS 10.75±0.5µs 7.5±0.5µs 7.5±0.5µs 4.5±0.5µs 2.3µs DATA STAT 5.5±0.5µs 450ns 400ns 500ns 400ns (NO TIMEOUT) 330ns Note: All timing is typical unless otherwise noted SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... 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 ...

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... 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). ...

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... 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 channel. Once shutdown, the transmitter can only be re-activated by Override Transmitter Shutdown or RESET RT commands. ...

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... 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 ...

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... 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. ...

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... RESERVED MODE CODES MESSAGE SEQUENCE = RESERVED MODE CODE (T STATUS RESERVED MODE CODE (T STATUS The CT2565 responds with status. If the command was broadcast, the broadcast received bit is set and status transmission suppressed. ERROR CONDITIONS (T 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) ...

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... 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 Description 25 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... 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. Aeroflex Circuit Technology Description 26 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... 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 RXDATA B Bipolar serial input from negative output of bus transceiver. 78 SOM Start of message output indicates beginning of RT/BC message transfer sequence. Aeroflex Circuit Technology Description 27 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...

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... RXDATA B 31 TXDATA A 77 RXDATA B 32 RXDATA A 39 12MHz 33 RTADP 78 SOM 34 RTAD1 40 GND 35 RTAD3 36 RESET 37 TXDATA B 38 RXDATA B 39 12MHz 28 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 (DDIP) Pin Function # 40 GND 41 BCSTART 42 NBGRNT 43 BITEN BUSGRNT 46 LOOPERR 47 SSBUSY 48 ILLCMD 49 ADRINC 50 CASE GND 51 WC0 ...

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... CHB/CHA 46 RXDATA B 33 TESTIN 12MHz SOM 44 GROUND 43 35 EOM N BUFENA 38 BUSREQ 39 BUSACK 40 +5V 41 N/C 29 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 (FP) Pin Function # 42 N/C 43 GROUND 44 SOM 45 12MHz 46 RXDATA B 47 RXDATA B 48 TXDATA B 49 TXDATA B 50 BCSTRCV 51 RESET 52 RTAD4 53 RTAD3 54 RTAD2 ...

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... MAX .050 .015 2.000 .050 Lead Centers 41 Leads/Side Figure 24 – Flat Package Outline 30 1.870 .250 MAX Pin 20 Pin 59 .018 DIA TYP Pin 78 Pin 40 .010 ±.002 Pin 42 .180 MAX 1.610 MAX MAX Pin 41 .080 SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 .250 ...

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... Per SMD Specifications subject to change without notice Toll Free Inquiries: (800) THE-1553 31 DESC SMD # Package - Plug in - Flat Package 5962-8858501XA Plug in 5962-8858501XC Plug in 5962-8858501YA Flat Package 5962-8858501YC Flat Package Telephone: (516) 694-6700 FAX: (516) 694-6715 E-Mail: sales-act@aeroflex.com SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700 ...