MA3690/1/3 MA3690/1/3 1553B Bus Controller/Remote Terminal Replaces June 1999 version, DS3587-4.0 The MA3690/1 chip set has three modes of operation: remote terminal, bus controller, and passive monitor It has a dual bus capability, requires minimum support hardware / software and is implemented on a radiation hard, CMOS/SOS process. For applications requiring access to Terminal Flag, a 48-Pin DIL MA3693 is available as an alternative to the MA3690. As a remote terminal, the MA3690/1 is fully compatible with Mil-Std-1553B. The chip set obtained SEAFAC approval in December 1987. All options and mode commands specified by the Mil Std are implemented Full and meaningful use is made of status word bits and a comprehensive bit word is provided. A unique mechanism has been incorporated that allows the subsystem to declare illegal commands legal, and vice versa, before the chip set services the command. It should be noted that use of this mechanism is optional and that the system defaults to normal operation if the option is not required. The chip set is easily interfaced to subsystem memory and is sufficiently flexible to ensure compatibility with a wide range of microprocessors. As a bus controller the MA3690/1 has the ability to initiate all types of 1553B transfer on either of the two buses An instruction word is set up by the subsystem, prior to transmission, which contains details of transfer type and bus selection. Four bits of the instruction word have been used to specify the conditions under which the chip set will generate a subsystem interrupt. The most significant bits of the instruction word have been used to specify the conditions under which the chip set will perform an automatic retry and the number of retries to be carried out (max. 3). At the end of each instruction execution cycle, the chip set writes a report word into the subsystem memory; the contents of which give the subsystem an indication of the degree of success of the transfer. The bus controller may be used in either of two configurations, i.e. single shot or table driven. In the single shot configuration, the controller is under direct control from the subsystem (processor). In table driven configuration, the controller is given greater autonomy to execute a table of instructions held in either ROM or RAM. As a passive monitor, the chip set will monitor all bus activity and pass any associated information to the subsystem. As the name implies, in this mode of operation, the chip set is truly passive and will not reply to command instructions. DS3587-5.0 January 2000 FEATURES ■ Radiation Hard to 1MRads (Si) ■ High SEU Immunity, Latch-Up Free ■ CMOS-SOS Technology ■ All Inputs and Outputs Fully TTL or CMOS Compatible ■ Military Temperature Range -55 to +125°C ■ Dual Bus Capability ■ Minimal Subsystem Interface ■ Powerful Bus Control Facility ■ Complete Remote Terminal Protocol ■ SEAFAC Approved SIGNAL DESCRIPTIONS All signals are TTL compatible unless stated otherwise. An ‘N’ at the end of the signal name denotes an active low signal. SUPPLIES VDD 5 volts positive supply VSS Ground CLOCK INPUTS CK12 12MHz clock BUS INTERFACE LINES PDIN0 Input Positive threshold exceeded on bus 0. NDIN0 Input Negative threshold exceeded on bus 0. TXEN0N Output Transmit enable for driver on bus 0. PDOUT0N Output Positive Manchester data for driver on bus 0. 1/41 MA3690/1/3 NDOUT0N Output Negative Manchester data for driver on bus 0. PDIN1 Input Positive threshold exceeded on bus 1. NDIN1 Input Negative threshold exceeded on bus 1. TXEN1N Output Transmit enable for driver on bus 1. PDOUT1N Output Positive Manchester data for driver on bus 1. NDOUT1N Output Negative Manchester data for driver on bus 1. SUBSYSTEM INTERFACE LINES STROBEN Output STROBE - Information transfer strobe pulse for words being transferred on the data highway. BUFENN Output BUFFER ENABLE - This line goes low to enable the data highway buffer between the terminal and the subsystem. R/WN Output READ/WRITE - This line indicates the direction of information transfer between the terminal and the subsystem. When low, information is being written from the terminal to the subsystem. DTRQN Output DATA TRANSFER REQUEST - This line goes low to request permission to transfer a non mode data word to or from the subsystem. DTAKN Input DATA TRANSFER ACKNOWLEDGE - This line should be driven low to grant permission to perform the requested data word transfer. MDTN Output MODE DATA TRANSFER RT: This line goes low to indicate that the data word being transferred is assosiated with a mode command. BC: When operating as a passive monitor this line goes low to indicate that a valid data word is on the data highway and should be written into the received data latch. GBRN Output GOOD BLOCK RECEIVED - When in RT mode this line will pulse low to inform the subsystem that the received non mode data words are valid and may be used. ADENN Output ADDRESS ENABLE - When in RT mode this line will go low as part of the reset routine to enable the terminal address on to the data highway. SYNCN Output SYNCHRONISE - This line will pulse low if a valid synchronise mode command without data is received and passes all validity checks. STATENN Output STATUS ENABLE RT: When low this line enables the contents of the subsystem status latch on to the data highway. BC: When low this line enables the BC report word on to the data highway. MDRN Output MODE DATA RECEIVED - This line will pulse low to inform the subsystem that the received mode data is valid and may be used. RXCMDN Output RECEIVED COMMAND RT: This line goes low to indicate that a valid command word for this RT is on the highway and should be written into the command word latch. BC: When operating as a passive monitor this line goes low to indicate that a valid command / status word is on the data highway and should be written into the received status latch. BUSYREQN / HALTREQN Input BUSY REQUEST / HALT REQUEST RT: This line should be driven low as a request for the terminal to set the busy bit and inhibit non mode data transfers to or from the subsystem. BC: This line should be driven low as a request for the terminal to halt table execution and all subsystem access. BUSYACKN / HALTEDN Output BUSY ACKNOWLEDGE / HALTED RT: This line will go low to indicate that the subsystem has free access to the shared store. BC: This line will go low to indicate that all terminal operation has been halted and hence the subsystem has free access to the shared store. CODENN Output CODE ENABLE - This line when low indicates that a word transfer between the terminal and either the Instruction Store or the Report Store is taking place. C0 Output CODE 0 - This line is the least significant address line from the terminal to the Instruction and Report Stores. C1 Output CODE 1 - This line is the least significant but one address line from the terminal to the Instruction and Report Stores. 2/41 MA3690/1/3 INCADRN Output INCREMENT ADDRESS - This line pulses low to increment the external instruction addressing counter. PUCN Input POWER UP CLEAR - This line should be pulsed low following power-up. HSFN/IRQN Output HANDSHAKE FAIL / INTERRUPT REQUEST RT: This line pulses low to inform the subsystem that it has not responded to a data transfer request to take place. BC: This line pulses low to generate an interrupt to the BC subsystem processor. RESETN Input/Output RESET - This line when low, forces the internal circuitry to reset to the quiescent initialised state. This is a ‘TTL’ level input on both devices and an open-drain output on the MA3690. The subsystem should drive this line via an open drain/collector device with external pull up fitted. INCMDN Output IN COMMAND - When low this line indicates that the terminal is currently servicing a command word. RT0 / RT1 Inputs REPLY TIMEOUT DECODE - These lines on the MA3690 allow four different timeout values to be used. On the MA3693, the RT1 signal is not available and is pulled down internally. EOTN Output END OF TRANSMISSION - When low this line indicates that the selected bus is quiet and hence available for use. ABORTN Output This line will pulse low to abort execution of the current command if an error is detected. B0-B15 Input/Output HIGHWAY LINES - 16 line bidirectional Output data highway. (B0 = LSB). CLDN Inter-chip (CMOS) COMMAND LOAD - When low this line indicates that the word on the data highway should be loaded into the transmitter for transmission with a command sync. DLDN Inter-chip (CMOS) DATA LOAD - When low this line indicates that the word on the data highway should be loaded into the transmitter for transmission with a data sync. OBFN Inter-chip (CMOS) OUTPUT BUFFER FULL - When low this line indicates that the transmitter output buffer is full and cannot be overwritten. RT1 RT0 Timeout (us) 0 0 1 1 0 1 0 1 16 22 44 108 Note: Under normal operation, option 00 should be used. (i.e. 16uS) The measurement is taken between mid parity and mid sync - measured at PDIN/NDIN terminals. TF Output TERMINAL FLAG - This line is available only on the 64-pin MA3690 and on the MA3693 (where it replaces RT1). The line indicates the state of the Terminal Flag bit in the Status Word, and can be inhibited by the mode code Inhibit Terminal Flag. This is an active LOW signal. TEST/SOT Inputs These lines are for test purposes only and for normal chip set operation must both be tied low. VALDRN Inter-chip (CMOS) VALID DATA RECEIVED - When low this line indicates that a valid data word has been received and is on the data highway. VALCRN Inter-chip (CMOS) VALID COMMAND RECEIVED RT: When low this line indicates that a valid command word for this RT has been received. BC: When low this line indicates that a valid word with a command sync has been received. RT/BCN Input REMOTE TERMINAL/BUS CONTROLLER - When high the terminal will function as an RT.When low the terminal will function as a bus controller. CK4 Output 4MHz system clock. 3/41 MA3690/1/3 OPERATION IN BUS CONTROL MODE For this mode of operation the RT/BC pin must be held in the logic zero state. On power up the PUC or RESET line must be pulsed low for a minimum of 500ns causing the chip set to initialise and assume the halted state with the HALTED output low. To release the terminal from the halted state, the subsystem must drive the HALTREQ line through a low to high transition, at which time the HALTED line will go inactive. When the HALTED line goes inactive,the terminal will address a four word deep Instruction Store as shown below, using the C0 and Cl outputs. This first instruction after a Reset is a NOOP. INSTRUCTION STORE C1 C0 The Function Code (bits 4 and 3 of the Instruction Word) specifies the required terminal mode of operation. Execute - Code 00 With the Function code bits set to 00, the terminal will execute the message as defined in the Message code bits Self Test - Code 01 If the terminal has been selected to perform a Self Test then the terminal transmitter output stages will be disabled and the self test sequence entered. At the end of the Self Test the transmitter stages will be re-enabled and a Report sequence will be activated, in order to report on the success, or failure, of the Self Test. Word Passive Monitor - Code 10 0 0 1 1 0 1 0 1 Instruction Receive Command Transmit Command Data Pointer If the Function code of the Instruction word is 10 the terminal will disable the transmitter output stages, suspend table execution and merely monitor the specified bus for valid words. The instruction word specifies the operation which the terminal is to carry out, and is formatted in the following way: Instruction Word Bit 15.14. 13.12.11. 10.9.8.7. 6.5. 4.3. 2.1.0. Retry Retry Interrupt Bus Functlon Message Count Condition Conditlon Select Code Code The significance of the instruction word bits are as follows: Message Code Code 000 001 010 011 100 101 110 111 Transfer Type RT to BC BC to RT RT to RT, data to BC subsystem RT to RT, no data to BC subsystem Broadcast RT to BC, non data mode commands only Broadcast BC to RT Broadcast RT to RT, data to BC subsystem Broadcast RT to RT, no data to BC subsystem Mode Codes without data are followed by a NOOP. Function Code Code 00 01 10 11 4/41 Terminal Function Execute message code Perform self test Monitor bus No operation (NOOP) No Operation - Code 11 The No Operation code provides a means of introducing delay or a wait sequence into the table operation. In selecting this code the terminal will be forced into the Report sequence and provide either an increment signal (INCADRN) or an interrupt (IRQN) if the Interrupt Always flag in the Instruction word has been selected. Bus Select Code 00 01 Definition Transmit on bus 0 Transmit on bus 1 Note: Bit 6 of the instruction word is tied low internally. The required data bus on which transactions take place is defined by bit 5. In addition to this, this bit defines the bus on which the Transmitter Self Test operation will be conducted and the choice of the bus for monitor purposes in Passive Monitor mode. Interrupt Condition Code Definition 0001 0010 0100 1000 Interrupt if no response Interrupt if status bit set Interrupt always Interrupt if word error If the terminal detects one of the above conditions and the appropriate flag is set, the the IRQ line will pulse low for 250ns. MA3690/1/3 Four bits of the Instruction word (bits 10-7) define conditions under which the terminal will generate an interrupt to the subsystem (IRQN). Note that the generation of IRQN will only take place after any selected retry conditions have been exhausted. The interrupt conditions which may be selected can be categorised as follows: Retry Count The two most significant bits of the instruction word specify the number of retries to be carried out when a retry condition has been detected. (Maximun 3 given by code 11) RECEIVE COMMAND WORD 1. Interrupt if no response - the terminal will generate an interrupt if the RT does not respond. 2. Interrupt if Status bit set - the terminal will generate an interrupt if a received status word has a bit set other than in the RT address field or if the wrong RT responds. 3. Interrupt Always - the terminal will generate an interrupt regardless of whether the message was successful or not. 4. Interrupt if word error - the terminal will generate an interrupt if a word encoding or word count error occurs. In all of the above cases, the terminal will generate a 250ns pulse on IRQN and enter the halted state. This will occur after the Report sequence has been executed. Note the INCADRN will not be produced. The receive command word is addressed when CODENN and C1 are both low and R/WN and C0 are both high. This word is the command word which will be transmitted for a BC to RT transfer or as the first command word of an RT to RT transfer. Note: This word should be set to 1111 HEX if the message code is 000 or 100, or if the Function Code is not 00. TRANSMIT COMMAND WORD The transmit command word is addressed when CODENN and C0 are both low and R/WN and C1 are both high. This word is the command word which will be transmitted for an RT to BC transfer or as the second command word of an RT to RT transfer. Retry Condition Code 001 010 100 Definition Retry if error Retry if status bit set Retry if busy set Three bits of the Instruction word (bits 13-11) are used as flags to specify conditions under which the terminal will execute automatic message retries until the retry number count is zero. The retry flags are involved with the following conditions: Note: This word should be set to 1111 HEX if the message code is 001 or 101, or if the Function Code is not 00. DATA POINTER WORD The data pointer word is addressed when CODENN is low and C0, C1 and R/WN are all high. This word is intended as a base address pointer to the subsystem data store thus specifying where any data words associated with the current instruction should be stored or retrieved from. As such, this word is not read into the terminal itself but is merely transferred from the Instruction Store to a suitable external address latch. (The BUFENN signal is therefore inactive during this transfer). 1. Retry if error - this includes a no-status response, a word encoding error, or a wrong word count from a responding RT. 2. Retry if Status bit set - an automatic retry will take place if a received status word has a bit set, other than in the RT address field, or if the wrong RT responds. 3. Retry if Busy - this is a specific check for the setting of the Busy bit in a responding RT’s status word. The remaining two bits of the Instruction word specify the number of message retries which the Bus Controller will attempt automatically. A code of 00 specifies no retries, a code of 11 specifies the maximum of three retries. The retries are in addition to the initial message transmitted, hence a message may be transmitted four times in total, if not successful. Note that if the condition which is being tested becomes invalid, the retry sequence will discontinue on the next message with the Bus Controller completing execution of the message in the relevant manner. 5/41 MA3690/1/3 REPORT STORE Subsystem Handshake Failure The report store holds information concerning the success or failure of the execution of the last instruction, and is addressed by means of the CODENN, C0 and C1 lines as for the instruction store The report store is addressed when the R/ WN line is low, the instruction store when the R/WN line is high. The report store comprises a Report word, a receive status word (if applicable) and a transmit status word (if applicable). The fourth location has no meaning and is not at anytime addressed. This bit will be set if the subsystem fails to acknowledge a terminal request to transfer a data word in 0.75us for a received data word or 13.5us for a transmit data word. If this condition takes place while the terminal is transmitting the transmission will be aborted. The setting of this bit will also cause a subsystem interrupt to be generated.. This bit will be reset to logic zero if the terminal is reset. C1 C0 0 0 1 1 0 1 0 1 Loop Test Failure This bit will be set if the receiver circuitry detects an absence of terminal transmission or a waveform encoding error occurs while the terminal is transmitting. The seting of this bit while the terminal is transmitting will cause the transmission to be aborted and a subsystem interrupt to be generated. This bit will be reset to logic zero if the terminal is reset. Word Report word RX status word TX status word Not used Programmed Halt REPORT WORD The report word gives the subsystem information as to the type of error associated with the last transfer (the word will be clear if no error occurred). The report word is formatted as follows: Continuous Bus Traffic 0 TX Timeout Bus 1 TX Timeout Bus 0 RX Status Flag RX Status Missing TX Status Flag TX Status Missing Command Error Word Count High Word Count Low Retry Used Programmed Halt Loop Test Fail SS Handshake Fail TX Timeout Error 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 This bit will be set if the Interrupt Always flag of the Instruction word has been selected. This bit will be reset at the start of each new instruction execution cycle. Retry Used This bit will be set if one or more message retries has been attempted. This bit will be reset at the start of each new instruction execution cycle. Word Count Low This bit will be set if the terminal detects fewer valid data words than specified by the Transmit Command word of the Instruction set. This bit will be set low at the start of each instruction execution cycle or message retry. Word County High The Report word is written at the end of message execution, after all retries have been exhausted and prior to the IRQN line being set active This word indicates the health of the terminal as well as information relating to the message execution. Transmitter Timeout Error This bit will be set if a transmitter timeout error occurs while the terminal is transmittting or if a self test on the transmitter timeout mechanism fails. This will come into effect 800us after the commencement of the Self Test. The setting of this bit will also cause a subsystem interrupt to be generated. This bit will be reset to logic zero if the terminal is reset. 6/41 This bit will be set if the terminal detects more valid data words than specified by the Transmit Command word of the Instruction set. This bit will be set low at the start of each instruction execution cycle or message retry. Command Error This bit will be set if an error occurs in the Instruction set. The setting of this bit will cause instruction execution to be aborted and a subsystem interrupt to be generated. This bit will be reset at the start of each new instruction execution cycle. MA3690/1/3 TX Status Missing This bit will be set if a no-response is detected from an RT which has been commanded to transmit and the relevant RT address was not the Broadcast address. This bit will be reset at the start of each new instruction cycle or message retry. TX Status Flag This bit will be set if the status word received from a transmitting RT has a bit set or has the wrong terminal address. This bit will be reset at the start of each new instruction execution cycle or message retry. RX Status Missing This bit will be set if a no-response is detected from an RT which has been commanded to receive and the relevant RT address was not the Broadcast address. This bit will be reset at the start of each new instruction cycle or message retry. This bit will be reset to logic zero when the terminal is reset or when the terminal detected a quiet bus. RECEIVE STATUS WORD The receive status word location is addressed when CODENN, C1 and R/WN are low and C0 is high. This location is used by the terminal to store the status word, if any, received from a receiving RT. In self test mode this location is updated with the contents of the receive command word during the instruction fetch cycle. TRANSMIT STATUS WORD The transmit status word location is addressed when CODENN, C0 and R/WN are low and C1 is high. This location is used by the terminal to store the status word, if any, received from a transmitting RT. In self test mode this location is updated with the contents of the transmit command word during the instruction fetch cycle. RX Status Flag MODES OF OPERATION This bit will be set if the status word received from a receiving RT has a bit set or has the wrong terminal address. This bit will be reset at the start of each new instruction execution cycle or message retry. The Bus Controller may be controlled in either a single shot mode or in a table driven mode. In the former, the execution of the message table would be under direct control of the subsystem, on a message by message basis. The table driven mode would provide a subsystem capable of more autonomous operation, leading to a greatly reduced level of processor intervention in the message execution level, at least. In either case the procedure of Instruction fetch, message execute and reporting would be the same. The difference arises from the value of the HALTREQN line when it is resampled at the end of message execution. This is further described below. Transmitter Timeout On Bus 0 This bit will be set if the transmitter timeout mechanism operates on Bus 0. This will be set under Self Test execution with Bus 0 selected in the Instruction word. This bit will be reset to logic zero if the terminal is reset. Transmitter Timeout On Bus 1 This bit will be set if the transmitter timeout mechanism operates on Bus 1. This will be set under Self Test execution with Bus 1 selected in the Instruction word. This bit will be reset to logic zero if the terminal is reset. Continuous Bus Traffic This bit will be set if the terminal detected that the data bus is already active when the BC is instructed to execute a message on that data bus. An active data bus is defined as a data stream of one command word or status word and greater than 32 continguous data words being received by the terminal. The setting of this bit will cause transmission to be suppressed and a subsystem interrupt to be generated. It should be noted that: SINGLE SHOT OPERATION To commence a message execution the subsystem must take the HALTREQN line low to high for a minimum of 1us. This will be followed by the terminal acknowledging this action by the HALTEDN line being set inactive (high). The HALTEDN line will remain high until the message has been completed, at which time the HALTREQN line is further sampled. If it is low then the terminal will halt and wait until the request line is taken high again, in effect a single instruction execution. It is important to the integrity of the system that the HALTREQN line is strictly glitch free, otherwise problems will arise with the terminal attempting to execute commands at a time when no terminal access to the various stores can be guaranteed. 1. This condition is only likely to be caused by a runaway RT which transmits continuously. 2. If this condition is present the subsystem is able to specify the use of the alternative bus for its transmissions. 7/41 MA3690/1/3 CONTINUOUS OPERATION The continuous message table operation mode can be achieved by ensuring that at the end of a message the HALTREQN line is high. Thus, assuming that the message has executed correctly, the terminal will generate a signal to increment the external address counter (INCADRN) and continue to the next instruction. If, however there has been an interrupt generated (IRQN active) the terminal will halt in the HALTEDN state until specifically requested to continue. Note that no address increment will take place. To continue execution the HALTREQN line should be taken low to high for the appropriate time. Continuous table driven operation results in an intermessage gap of 20us. Figure 1 shows the instruction fetch and execute cycle. Has HALTREQ gone low to high ? NO YES Set HALTED high Fetch Instruction Message Command Error ? YES NO Execute Instruction YES Retry Count = 0 ? Retry Required ? NO YES Output Report Word NO Decrement Retry Count YES INT. Required ? NO Pulse IRQ Increment Instruction Address SET HALTED low YES HALTREQ =0? Figure 1: BC Instruction Fetch and Execute Cycle 8/41 NO MA3690/1/3 PASSIVE MONITOR The terminal may be configured into a Passive Monitor (or Bus Monitor) merely by selecting the appropriate Function Code of the Instruction word. By doing this the terminal will not take part in any further Instruction execution but instead will monitor the selected bus for data transmissions. INTERRUPT / RETRY CAPABILITY The terminal has certain in-built functions which permit the terminal to retrieve situations which would normally cause a greater degree of subsystem intervention. This is achieved by having an automatic retry facility in-built to the terminal which is selectable from the Instruction word. In this case both the condition and number of attempts for which the terminal must try may be specified. After completion of the required number of attempts, terminal operation may be halted with the possibility of an interrupt generated also. The interrupt facility provides a means of more direct subsystem interaction in the event of a failure. Similar flags are required to be set in the Instruction word before a selectable interrupt may be generated. This form of interrupt also includes an Interrupt Always flag whose application may be used to determine subsystem/system timing requirements. It should be noted that an interrupt may also be generated by the error checking procedures of the terminal which verify aspects of the Instruction word and associated Receive/ Transmit command words. STANDBY BUS CONTROLLER The terminal provides a number of signals to the subsystem for message addressing and execution. Two address lines are provided (CO, Cl) plus a signal to increment an external counter (INCADRN). This, together with the onchip sequencing, error checking, etc., enables a standby bus controller, using a fixed table of messages, to be realised in few devices as shown in Figure 2. It is therefore possible to attain a standby BC on a single 6 x 4 PCB card. Figure 2: Standby Bus Controller 9/41 MA3690/1/3 FULL BUS CONTROLLER To make use of the SOS chipset’s capabilities a processorbased system would be more applicable. A block diagram of such a system, using shared store technique is shown in Figure 3. In this, the instruction word store would be alterable by the processor for use in various system conditions, i.e. a basic message table would initialy be set up with the processor monitoring the results of execution from the report word store and / or the interrupt request (IRQN) line. On detection of an erroneous condition, the processor could write a new message table to test the RT in error by, for example, a self test mode command. The inclusion of automatic retry, with a maximum of 3 retries, in the instruction word, removes the requirement from the processor to retry under simple RT faults, e.g., status bit set. Figure 3: Full Bus Controller 10/41 MA3690/1/3 SUBSYSTEM INTERFACE The terminal / subsystem interface consists of a 16 bit bidirectional data highway and a number of control lines, many of which are of optional use. The subsystem lines have been arranged such as to allow a simple shared store technique to be readily implemented but sufficient flexibility has been designed to allow optimisation of the interface for a particular subsystem design. The terminal contains a 16 regisiter, called BIT word, which records message errors and terminal status information. The entire BIT word contents are reset by power up initialisation or a legal mode command to reset remote terminal. The conditions for the setting of the BIT, and any additional reset conditions are given for each signal. The contents of the BIT word register shall not be altered by any of the following legal mode commands. Transmit Status Word (TSW), Transmit Last Command (TLC) and Transmit BIT Word (TBW). REMOTE TERMINAL MODE Transmitter Timeout Error On initialisation, the RT address, address parity and broadcast enables are loaded from the subsystem via the data highway, Figure 4. The subsystem status bits are also loaded in a similar manner when required, Figure 5. This terminal uses two distinct methods for dealing with non mode data and mode data. In the first, a busy request / acknowledge handshake is used to ensure no data transfer takes place when the subsystem is busy thus ensuring no addressing / data conflict of the main data store. Mode data, however, may be transferred even if the subsystem has declared itself busy. This represents a departure from previous chipset philosophy. The validation of a data transfer also depends on data type. For non mode data, a data transfer request / acknowledge handshake is used to transfer each data word to or from the subsystem (both RT and BC) with a good block received (GBRN) denoting a correct transfer. For mode data, a mode data transfer (MDTN) is used to signal a mode data word with correct transfer being denoted by mode data received (MDRN). Thus, dependant on application, the l/O signals may be significantly reduced. An RT subsystem interface signal transfer is shown in Figure 6. This BIT shall be set to logic one if transmitter timeout occurs while the terminal is tranmitting. In addition, if the terminal is issued with a legal mode command to Initiate Self Test (code 00011) this bit shall be set if the range transmitter timeout mechanism does not operate within the of 660 µs to 800 µs. BIT WORD 0 0 TX Timeout Bus 1 TX Timeout Bus 0 Terminal Flag Inhibited 0 Bus 1 Shutdown Bus 0 Shutdown Illegal Broadcast Word Count High Word Count Low Illegal Command Illegal T/R Bit Loop Test Failure SS Handshake Failure TX Timeout Error 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Subsystem Handshake Failure This bit shall be set to logic one if the subsystem does not acknowledge a terminal request to transfer a data word in time for the transfer to take place correctly. Loop Test Failure At all times while the terminal is transmitting the relevant receiver circuitry checks for an absence of transmission or any sync, Manchester, parity or contiguity error in the terminals transmission. This bit shall be set to logic one if any of these error conditions are detected. Illegal T/R Bit This bit shall be reset to logic zero by the reception of any valid command word with the exception TSW,TLC and TBW. This bit shall be set to logic one if a valid mode command is received with a transmit/receive (T/R) bit opposite to that specified by MIL-STD-1553B. Illegal Command This bit shall be reset to logic zero by the reception of any valid command word with exceptions TSW, TLC and TBW. This bit shall be set to logic one if any of the following conditions arise: (a) The ILLEGAL COMMAND line to the subsystem status latch is low at the time when INCMD goes active low. (b) A valid mode command is received with a reserved mode code and the ALLOW CODE line to the subsystem staus latch is high at the time when INCMD goes low. (c) An illegal transitter shutdown mode command is received. 11/41 MA3690/1/3 Word Count Low This bit shall be reset to logic zero by the reception of any valid command word with the exception of TSW, TLC and TBW. This bit shall be set to logic one if fewer valid data words are received than specified by the preceding command word. Word Count High This bit shall be rest to logic zero by the reception of any valid command word with the exception of TSW, TLC and TBW. This bit shall be set to logic one if the received message is longer than stipulated by the preceeding command word. ADEN RTAD0 RTAD1 RTAD2 RTAD3 RTAD4 RTADPAR EN BUFFER BCSTEN0 BCSTEN1 B0 B1 B2 B3 B4 B5 B6 B7 Illegal Broadcast This bit shall be reset to logic zero by the reception of any valid command word with the exception of TSW, TLC and TBW. This bit shall be set to logic one if a valid command word which by definition requires terminal transmission is received with the broadcast address. Note: RTAD0, RTAD1, RTAD2, RTAD3, RTAD4 define the RT address RTADPAR odd parity with the address bits BCSTEN0 - Broadcast enable for BUS0 BCSTEN1 - Broadcast enable for BUS1 Figure 4: Subsystem RT Address Buffer Bus 0 Shutdown This bit shall be set to logic one if bus 0 is shutdown. Bus 1 Shutdown This bit shall be set to logic one if bus 1 is shutdown. Terminal Flag Inhibited This bit shall be set to logic one if the internal terminal flag inhibit is set. Transmitter Timeout on Bus 0 This bit shall be set to logic one if a transmitter timeout has occured on bus 0. Transmitter Timeout on Bus 1 This bit shall be set to logic one if a transmitter timeout has occured on bus 1. 12/41 MA3690/1/3 SSERR - A low will cause the Subsystem flag to be set in the terminal status word. STATENN INCMDN SERVREQ - A low will set the service request bit of the terminal status word. DBCACC SSERR SERVREQ ILLEGAL COMMANDS ALLOW CODE RES0 G OE B0 B1 B2 B3 B4 ILLEGAL COMMAND - Allows the subsystem to declare any command word illegal. When low the terminal will inhibit data transfers to or from the subsystem, and after message validation will respond with the message error bit set in the terminal status word. B5 B6 B7 RES1 RES2 TRANSPARENT LATCH DBACC - Dynamic Bus Acceptance. If low then the Dynamic Acceptance bit of the terminal status word will be set in response to a legal Mode Command for Dynamic Bus Control allocation. After switching to the BC mode of operation the first instruction must be a NOOP. ALLOW CODE - Provides the subsystem with the capability to declare any of the reserved mode codes as being meaningful. If a reserved mode code is received when high the command is treated as illegal and after message validation responds with ME bit set in the terminal status word. If low the most significant bit of the mode code and the T/R bit determine whether any data words are involved and their direction. RES0, RES1, RES2 - Provides the subsystem the capability of setting any of the currently reserved bits of the terminal status word. Figure 5: Subsystem Status Latch Figure 6: Remote Terminal Subsystem Interface Signal Transfer 13/41 MA3690/1/3 BUS CONTROLLER MODE For data transfers generally, 750ns enable signals (BUFENN,R/WN etc.) are produced by the terminal with a 250ns strobe signal upon which the data will be valid. The bus controller terminal provides signals to fetch the message and write out a report and any associated data. The HALTREQN and HALTEDN handshake lines operate in a similar fasion to the BUSYREQN / BUSYACKN RT lines in that if HALTREQN is taken low the terminal will complete the current instruction and then halt, taking HALTEDN low to indicate that it has done so A BC subsystem may be operated in either a single shot or table driven mode. In either case, the two least significant address lines (C0,C1) to the instruction and report word stores are provided by the terminal. On taking HALTREQN high (for a minimum of 1us) the subsystem initiates an instruction fetch cycle which consists of the terminal reading the instruction word, receive command word and transmit command word from the instruction store and transferring the data pointer word from the instruction store to an external data address latch. Further operation is dependent on the instruction word. On executing a message sequence the terminal will write out the report word and either: 1. Increment the instruction address and proceed to the next instruction, 2. Increment the instruction address and halt, 3. Do not increment the instruction address, interrupt subsystem and halt. Any data associated with the command will be transferred to or from the data store in a similar manner as used by the RT. Figure 7: Bus Controller Subsystem Interface Signal Transfer 14/41 MA3690/1/3 Figure 8: Chip Set Interconnection Diagram 15/41 MA3690/1/3 Subgroup Definition 1 2 3 7 8a 8b 9 10 11 Static characteristics specified in Figure 11 at +25°C Static characteristics specified in Figure 11 at +125°C Static characteristics specified in Figure 11 at -55°C Functional characteristics specified at +25°C Functional characteristics specified at +125°C Functional characteristics specified at -55°C Switching characteristics specified in Figure 12 at +25°C Switching characteristics specified in Figure 12 at +125°C Switching characteristics specified in Figure 12 at -55°C Figure 9: Definition of Subgroups DC CHARACTERISTICS AND RATINGS Parameter Min Max Units Supply Voltage -0.5 7 V Input Voltage -0.3 VDD+0.3 V Operating Temperature -55 125 °C Storage Temperature -65 150 °C Note: Stresses above those listed may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these conditions, or at any other condition above those indicated in the operations section of this specification, is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Figure 10: Absolute Maximum Ratings Total dose radiation not exceeding 3x105 Rad(SI) Symbol Parameter Conditions Min Typ Max Units VDD Supply Voltage - 4.5 5.0 5.5 V VIH1 TTL Input High Voltage - 2.0 - - V VIL1 TTL Input Low Voltage - - - 0.8 V VIH2 CMOS Input High Voltage - 3.5 - - V VIL2 CMOS Input Low Voltage - - - 1.5 V VOH1 TTL Output High Voltage IOH = -1mA VDD-0.4 - - V VOL1 TTL Output Low Voltage IOL = 2mA - - 0.4 V VOH2 CMOS Output High Voltage IOH = -1mA VDD-0.4 - - V VOL2 CMOS Output Low Voltage IOL = 2mA - - 0.4 V IIL1 Input Low Current VIN = VSS (Note 1) - - -10 µA IIH1 Input High Current VIN = VDD (Note 1) - - 10 µA IIL2 Input Low Current (RT1) VIN = VSS (Note 1) - - -50 µA IIH2 Input High Current (RT2) VIN = VDD (Note 1) 50 - 150 µA IOZL IO Low Current VIN = VSS (Note 1) - - -50 µA IOZH IO High Current VIN = VDD (Note 1) - - 50 µA IDD Power Supply Current - - - 25 mA VDD = 5V±10%, over full operating temperature range. Note 1: Guaranteed but not tested at -55°C Mil-Std-883, method 5005, subgroups 1, 2, 3 Figure 11: Electrical Characteristics 16/41 MA3690/1/3 Symbol t1 t2 t3 t4 t5 t6 t7 t7a t7b t8 t9 t10 t11 t12 t13 t14 t15 t16 t17 t18 t19 t20 t21 t22 t23 t24 t25 t26 t27 t28 t29 t30 t31 t32 t33 t34 t34a t35 t36 t37 t38 t39 Description Min. CK4 to BUS [B0:B15] VALID CK4 to BUS [B0:B15] High Impedance B0: B15 set up wrt STROBEN ↑ B0: B15 hold wrt STROBEN ↑ VALCRN ↓ to RXCMDN ↓ Pulse width RXCMDN, R/WN, STATENN, BUFENN, CLDN, DLDN, MDTN, CODENN Pulse width STROBEN, GBRN, MDRN, SYNCN, IRQN RXCMDN/R/WN/STATENN/BUFENN/CLDN/DLDN /MDTN, CODENN ↓ to STROBEN As 7a from STROBEN ↑ RXCMDN ↑ to INCMD ↓ INCMDN ↓ to STATENN ↓ VALCRN pulse width VALDRN ↓ to DTRQN ↓ DTRQN ↓ to DTAKN ↓ (RXDATA) DTAKN ↓ to BUFENN ↓ DTRQN ↑ to CLDN ↓ CLDN ↑ to GBRN ↓ CLDN ↓ to STATUS valid BUS B0:B15 CLDN ↑ to STATUS invalid on B0:B15 DTRQN ↑ to DTAKN ↑ STATENN to CLDN ↓ Non mode data CLDN ↑ to DTRQN ↓ DTRQN ↓ to DTAKN ↓ (TX data) VALDRN ↓ to R/WN ↓ MDTN ↓ to CLDN ↓ CLDN ↑ to MDRN ↓ STATENN to CLDN ↓ mode data CLDN ↑ to MDTN ↓ MDTN ↑ to INCMDN ↑ DTRQN ↑ to INCMDN ↑ (non broadcast) DTRQN ↑ to INCMDN ↑ (broadcast) MDTN ↑ to INCMDN ↑ (broadcast) CLDN ↑ to INCMDN ↑ (mode) CLDN ↑ to TXENN ↓ TXENN/PDOUTN/NDOUTN/prop delay difference Start of transmission to EOTN ↑ End of transmission to EOTN ↓ End of transmission to ABORTN ↓ 1) RT1 = 0 RT0 = 0 2) RT1 = 0 RT0 = 1 3) RT1 = 1 RT0 = 0 4) RT1 = 1 RT0 = 1 Minimum no response timeout 1) RT1 = 0 RT0 = 0 2) RT1 = 0 RT0 = 1 3) RT1 = 1 RT0 = 0 4) RT1 = 1 RT0 = 1 Remote terminal response time Minimum PUCN pulse width PUCN ↓ to RESET ↓ Typ. Max. Units 235 220 nS nS nS 15 25 3t 3t 1t 1t 1t 4t 3t 5t 1t 3t 2t 0 1t 24t 15t 16t 100 35 0 11t nS nS 12t 15t 0 2t 54t 3t 24t 14t 11t 15t 77t 77t 12t 16t 78t 78t 25t 25t 11t 1t 12t 2t 6 76t12 82t12 15.75 21.75 43.75 107.75 10.3 20 nS 20 26 48 112 uS uS uS uS 16.25 22.25 44.25 108.25 11.25 uS uS uS uS uS nS nS 90 Figure 12: AC Electrical Characteristics 17/41 MA3690/1/3 Symbol t40 t41 t42 t43 t44 t45 t46 t47 t48 t49 t50 t51 t52 t53 t54 t55 t56 t57 t58 t59 t60 t61 t62 t63 t64 t65 t66 t67 Description Min. RESETN ↓ to ADEN ↓ PUCN ↑ to RESETN ↑ RESETN ↑ to ADENN ↑ Initialisation word set-up wrt RESETN ↑ Initialisation word HOLD wrt RESETN ↑ Minimum RESETN pulse width Minimum CK12 high Minimum CK12 low CK12 ↑ to CK4 ↑ CK12 ↓ to CK4 ↓ HALTREQN pulse width HALTREQN ↑ to HALTEDN ↑ HALTREQN ↑ to CODENN ↓ CODENN ↑ to CODENN ↓ RT-RT minimum validation time 1) RT1 = 0 RT0 = 0 2) RT1 = 0 RT0 = 1 3) RT1 = 1 RT0 = 0 4) RT1 = 1 RT0 = 1 HALTREQN setup for next message wrt to INCMDN ↑ R/WN ↓ to R/WN ↓ RT-BC Report cycle BUFENN ↑ to BUFENN ↓ Data word to report word BC intermessage gap 1) without a No Operation instruction 2) with a No Operation instruction CODENN interval high between received status and report word during report cycle CODENN interval between report word and next message fetch for continuous operation CODEN interval between BC Noop data pointer fetch and report word INCMDN ↑ to INCADDRN ↓ BUSYREQN ↓ to BUSYACKN ↓ BUSYREQN ↑ to BUSYACKN ↑ INCMDN ↑ to BUSYACKN ↓ INCMDN ↑ to BUSYACKN ↑ CK4 ↑ to R/WN/BUFENN/CO/C1/CODENN/MDTN Typ. 2t 2t Max. Units 80 nS 2t + 80 nS nS nS nS nS nS nS nS 15 20 90 33 20 90 90 1t 1t 55 2t nS 56.25 62.25 84.25 148.25 uS uS uS uS nS 2t 55.75 61 75 83.75 147.75 150 80t 29t 20 28 24t uS uS 6t 5t 1t 60 60 60 100 115 nS nS nS nS nS Mil-Std-883, method 5005, subgroups 9, 10, 11 Notes: 1. t = CK4 period, t12 = CK12 period 2. Times quoted as typical means a fixed number of CK4 clock cycles but excludes slight variations due to propagation delays. Conditions: Vdd = 4.5 to 5.5V, Tamb = -55°C to +125°C, VIL = 0V, VIH = 4V, VOUT Threshold = 1.5V except t2 where measured by a 1V change in output voltage. Load = 50pf except t2 where additional 1K load to 0V or VDD. Figure 12: AC Electrical Characteristics (continued) 18/41 MA3690/1/3 LIST OF TIMINGS 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 Clock Timing Power Up Clear Initialisation Subsystem Reset Minimum No Response Timeout Abort Start of Transmission Detect End of Transmission Detect RT Command Reception and Subsystem Status Read BC-RT Data Transfer (Non Mode) + Status RT Status + RT-BC Data Transfer (Non Mode) Received Mode Data Transfer + Status RT Status + Transfer Mode Data Transfer Broadcast BC-RT Data Transfer (Non Mode) RT-Broadcast Received Mode Data Transfer Mode Command No Data (TIR) Remote Terminal Response Time RT-RT Validation Timeout Remote Terminal Busy Handshake RT Status Load BC-Message Fetch Sequence BC-Report Cycle (shown for RT-RT no data to subsystem) RT-BC Report Cycle BC Intermessage Gap BC-No Operation BC-Self Test (Report Sequence) BC-Passive Monitor BC-Retry BC-Data Transfer Handshake Figure 13: List of Timings TIMING DIAGRAMS Figure 14: Clock Timing 19/41 MA3690/1/3 Note: If the first command to the RT following power up is to be TLSW then initialisation should be via PUC. PUC is driven by the subsystem. Figure 15: Power Up Clear Initialisation * RESET must be driven from subsystem via an open drain/ collector device Figure 16: Subsystem Reset 20/41 MA3690/1/3 This value is programmable using the RT0/RT1 inputs Figure 17: Minimum No Response Timeout This sequence will also occur at the end of each message unless a new message is received. Figure 18: Abort Note: Detection is sync + 3 data bits Figure 19: Start of Transmission Detect 21/41 MA3690/1/3 Figure 20: End of Transmission Detect Note: Quote time pulse as typical, except t1, t2, t3 and t4. Figure 21: RT Command Reception and Subsystem Status Read 22/41 MA3690/1/3 Figure 22: BC-RT Data Transfer (Non-Mode) + Status Note: For successive data words DTRQ ↓ to DTRQ ↓ = 80 x CK4 periods (20µs) Figure 23: RT Status + RT-BC Data Transfer (Non Mode) 23/41 MA3690/1/3 Figure 24: Received Mode Data Transfer + Status Note: Exception MDT is not active for TLC, TBIT Figure 25: RT Status + Transfer Mode Data Transfer 24/41 MA3690/1/3 Figure 26: Broadcast BC-RT Data Transfer (Non Mode) Note: MDT, MDR are not active for m/c STSD and ORSTSD Figure 27: RT-Broadcast Received Mode Data Transfer 25/41 MA3690/1/3 Note: 1. SYNC m/c. 2. Self test m/c - takes 668µs from end of Status transmission on 1553 Bus. 3. Reset m/c/ - Reset pulse 3 x CK4 after TXCN ↑ this prevents ABORT pulse following this command and fires EOT high and remains high. Figure 28: Mode Command No Data (TIR) Figure 29: Remote Terminal Response Time Figure 30: RT-RT Validation Timeout 26/41 MA3690/1/3 Figure 31: Remote Terminal Busy Handshake Figure 32: RT Status Load 27/41 MA3690/1/3 Note: BUFEN is not active for the DATA POINTER WORD as the 3690/1 does not use the word. It is required by subsystem only. Figure 33: BC-Message Fetch Sequence 28/41 MA3690/1/3 Note: for DATA to SUBSYSTEM GBR (no mode) or MDR (mode data) will pulse as shown - otherwise GBR, MDR do not pulse Figure 34: BC-Report Cycle (shown for RT-RT no data to subsystem) 29/41 MA3690/1/3 Figure 35: RT-BC Report Cycle Figure 36: BC Intermessage Gap 30/41 MA3690/1/3 Figure 37: BC - No Operation 31/41 MA3690/1/3 Figure 38: BC - Self Test (Report Sequence) Figure 39: BC - Passive Monitor 32/41 MA3690/1/3 Note: The message fetch sequence is not repeated for any retries. It is therefore essential that the subsystem zeros the DATA word address counter for each RETRY. This is simply achieved by using CLD to clear the counter and DTAK to increment the counter. Figure 40: BC - Retry Figure 41: BC - Data Transfer Handshake 33/41 MA3690/1/3 OUTLINES Ref. Min. Nom. Max. A - - 4.37 (0.172) A1 1.016 (0.04) - 1.53 (0.060) b 0.40 (0.016) - 0.508 (0.020) c 0.20 (0.009) - 0.305 (0.012) D - - 61.57 (2.424) e - 2.54 (0.100) - e1 - 15.24 (0.600) - H 4.71 (0.185) - 5.38 (0.212) ME - - 15.75 (0.620) W - - 1.53 (0.060) Dimensions in mm (inches) GPS XG426 Figure 42a: 48-Lead Ceramic DIL (solder seal) - Package Style C 34/41 MA3690/1/3 TRANSCEIVER CHIP (MA3690) TERMINAL CONTROLLER CHIP (MA3691) See Note - Note: On the MA3693 RT1 is replaced by Terminal Flag TFN (TTL Output) Figure 42b: 48-Lead Ceramic DIL (solder seal) - Package Style C 35/41 MA3690/1/3 TRANSCEIVER CHIP (MA3693) (For applications that require access to Terminal Flag) See Note - Note: The MA3693 has Terminal Flag (TFN) latched signal OUTPUT on pin 13 (TTL). This replaces the RT1 signal INPUT that is used on the MA3690 standard version. Figure 42c: 48-Lead Ceramic DIL (solder seal) - Package Style C 36/41 MA3690/1/3 Ref. Min. Nom. Max. A - - 2.1 (0.083) A1 b 0.96 (0.038) 0.41 (0.016) - 1.07 (0.042) 0.51 (0.020) c 0.178 (0.007) - 0.254 (0.010) D1,D2 - - 23.11 (0.910) E 15.54 (0.612) - 15.95 (0.628) e - 1.27 (0.050) - L 8.89 (0.350) - 9.27 (0.365) Z 1.73 (0.068) - 2.16 (0.085) Dimensions in mm (inches) GPS XG487 Figure 43a: 64-Lead Topbraze Flatpack (Package Style F) 37/41 MA3690/1/3 Figure 43b: 64-Lead Topbraze Flatpack (Package Style F) 38/41 MA3690/1/3 Figure 43c: 64-Lead Topbraze Flatpack (Package Style F) 39/41 MA3690/1/3 RADIATION TOLERANCE Total Dose Radiation Testing For product procured to guaranteed total dose radiation levels, each wafer lot will be approved when all sample devices from each lot pass the total dose radiation test. The sample devices will be subjected to the total dose radiation level (Cobalt-60 Source), defined by the ordering code, and must continue to meet the electrical parameters specified in the data sheet. Electrical tests, pre and post irradiation, will be read and recorded. GEC Plessey Semiconductors can provide radiation testing compliant with Mil-Std-883 test method 1019, Ionizing Radiation (Total Dose). Total Dose (Function to specification)* 3x105 Rad(Si) Transient Upset (Stored data loss) 5x1010 Rad(Si)/sec Transient Upset (Survivability) >1x1012 Rad(Si)/sec Neutron Hardness (Function to specification) >1x1015 n/cm2 Single Event Upset** <1x10-10 Errors/bit day Latch Up Not possible * Other total dose radiation levels available on request ** Worst case galactic cosmic ray upset - interplanetary/high altitude orbit Figure 44: Radiation Hardness Parameters ORDERING INFORMATION Unique Circuit Designator Radiation Tolerance S R Q H MAx3690xxxxx MAx3691xxxxx MAx3693Cxxxx Radiation Hard Processing 100 kRads (Si) Guaranteed 300 kRads (Si) Guaranteed 1000 kRads (Si) Guaranteed QA/QCI Process (See Section 9 Part 4) Test Process (See Section 9 Part 3) Package Type C F N Ceramic DIL (Solder Seal) Flatpack (Solder Seal) Naked Die Assembly Process (See Section 9 Part 2) Reliability Level For details of reliability, QA/QC, test and assembly options, see ‘Manufacturing Capability and Quality Assurance Standards’ Section 9. 40/41 L C D E B S Rel 0 Rel 1 Rel 2 Rel 3/4/5/STACK Class B Class S MA3690/1/3 http://www.dynexsemi.com e-mail: [email protected] HEADQUARTERS OPERATIONS DYNEX SEMICONDUCTOR LTD Doddington Road, Lincoln. Lincolnshire. LN6 3LF. United Kingdom. Tel: 00-44-(0)1522-500500 Fax: 00-44-(0)1522-500550 DYNEX POWER INC. Unit 7 - 58 Antares Drive, Nepean, Ontario, Canada K2E 7W6. Tel: 613.723.7035 Fax: 613.723.1518 Toll Free: 1.888.33.DYNEX (39639) CUSTOMER SERVICE CENTRES France, Benelux, Italy and Spain Tel: +33 (0)1 69 18 90 00. Fax: +33 (0)1 64 46 54 50 North America Tel: 011-800-5554-5554. Fax: 011-800-5444-5444 UK, Germany, Scandinavia & Rest Of World Tel: +44 (0)1522 500500. Fax: +44 (0)1522 500020 SALES OFFICES France, Benelux, Italy and Spain Tel: +33 (0)1 69 18 90 00. Fax: +33 (0)1 64 46 54 50 Germany Tel: 07351 827723 North America Tel: (613) 723-7035. Fax: (613) 723-1518. Toll Free: 1.888.33.DYNEX (39639) / Tel: (831) 440-1988. Fax: (831) 440-1989 / Tel: (949) 733-3005. Fax: (949) 733-2986. UK, Germany, Scandinavia & Rest Of World Tel: +44 (0)1522 500500. Fax: +44 (0)1522 500020 These offices are supported by Representatives and Distributors in many countries world-wide. © Dynex Semiconductor 2000 Publication No. DS3587-5 Issue No. 5.0 January 2000 TECHNICAL DOCUMENTATION – NOT FOR RESALE. PRINTED IN UNITED KINGDOM Datasheet Annotations: Dynex Semiconductor annotate datasheets in the top right hard corner of the front page, to indicate product status. The annotations are as follows:Target Information: This is the most tentative form of information and represents a very preliminary specification. No actual design work on the product has been started. Preliminary Information: The product is in design and development. The datasheet represents the product as it is understood but details may change. Advance Information: The product design is complete and final characterisation for volume production is well in hand. No Annotation: The product parameters are fixed and the product is available to datasheet specification. This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company reserves the right to alter without prior notice the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request. All brand names and product names used in this publication are trademarks, registered trademarks or trade names of their respective owners. 41/41