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MAH3691CC Datasheet(PDF) 2 Page - Dynex Semiconductor |
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MAH3691CC Datasheet(HTML) 2 Page - Dynex Semiconductor |
2 / 41 page MA3690/1/3 2/41 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. |
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