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FX949 Datasheet(PDF) 22 Page - CML Microcircuits |
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FX949 Datasheet(HTML) 22 Page - CML Microcircuits |
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22 / 25 page  CDPD Wireless Modem Data Pump FX949 © 1996 Consumer Microcircuits Limited 22 D/949/5 For the following conditions unless otherwise specified: Xtal Frequency = 4.9152MHz, VDD = 3.3V to 5.0V, Tamb = -40°C to +85°C. Notes Min. Typ. Max. Units µµP Interface Timings (ref. Fig. 7) tACSL Address valid to CSN low time 0 ns tAH Address hold time 10 ns tCSH CSN hold time 0 ns tCSHI CSN high time 6 clock cycles tCSRWL CSN to WRN or RDN low time 0 ns tDHR Read data hold time 0 ns tDHW Write data hold time 0 ns tDSW Write data setup time 90 ns tRHCSL RDN high to CSN low time (write) 0 ns tRACL Read access time from CSN low 11 175 ns tRARL Read access time from RDN low 11 145 ns tRL RDN low time 200 ns tRX RDN high to D0 - D7 3-state time 50 ns tWHCSL WRN high to CSN low time (read) 0 ns tWL WRN low time 200 ns Notes: 11. With 30pF max. to VSS on D0 - D7 pins. |
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