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FX949 Datasheet(PDF) 5 Page - CML Microcircuits |
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FX949 Datasheet(HTML) 5 Page - CML Microcircuits |
5 / 25 page CDPD Wireless Modem Data Pump FX949 © 1996 Consumer Microcircuits Limited 5 D/949/5 Package L4 Package L6 Signal Description Pin No. Pin No. Name Type 33 37 CSN I/P Chip Select. An active low logic level input to the modem, used to enable a data read or write operation. 34 38 WRN I/P Write. An active low logic level input used to control the writing of data into the modem from the controlling µP. 35 39 RDN I/P Read. An active low logic level input used to control the reading of data from the modem into the controlling µP. 38 41 A6 I/P ) 39 42 A5 I/P ) 43 1 A4 I/P ) 44 2 A3 I/P ) 7 logic level modem register address select 45 3 A2 I/P ) inputs. 46 4 A1 I/P ) 47 5 A0 I/P ) 1, 6, 11, 19, 24, 30, 36, 37, 40, 41, 42, 48 6, 7, 16, 28, 30, 40, 43, 44 ) ) ) No internal connection: leave open circuit. ) ) ) 21, 22, 23, 25, 28, 29, 31 25, 26, 27, 29, 33, 34, 35 ) ) Internally connected: leave open circuit. ) ) Notes: I/P = Input O/P = Output BI = Bidirectional |
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