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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC855 датащи(PDF) 55 Page - Motorola, Inc |
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MPC855 датащи(HTML) 55 Page - Motorola, Inc |
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55 / 76 page  MOTOROLA MPC860 Family Hardware Specifications 55 SCC in NMSI Mode Electrical Specifications 11.6 SCC in NMSI Mode Electrical Specifications Table 11-18 provides the NMSI external clock timing. Table 11-19 provides the NMSI internal clock timing. Figure 11-54 through Figure 11-56 show the NMSI timings. Table 11-18. NMSI External Clock Timing Num Characteristic All Frequencies Unit Min Max 100 RCLK1 and TCLK1 width high 1 1 The ratios SYNCCLK/RCLK1 and SYNCCLK/TCLK1 must be greater than or equal to 2.25/1. 1/SYNCCLK — ns 101 RCLK1 and TCLK1 width low 1/SYNCCLK + 5 — ns 102 RCLK1 and TCLK1 rise/fall time — 15.00 ns 103 TXD1 active delay (from TCLK1 falling edge) 0.00 50.00 ns 104 RTS1 active/inactive delay (from TCLK1 falling edge) 0.00 50.00 ns 105 CTS1 setup time to TCLK1 rising edge 5.00 — ns 106 RXD1 setup time to RCLK1 rising edge 5.00 — ns 107 RXD1 hold time from RCLK1 rising edge 2 2 Also applies to CD and CTS hold time when they are used as an external sync signal. 5.00 — ns 108 CD1 setup Time to RCLK1 rising edge 5.00 — ns Table 11-19. NMSI Internal Clock Timing Num Characteristic All Frequencies Unit Min Max 100 RCLK1 and TCLK1 frequency 1 1 The ratios SYNCCLK/RCLK1 and SYNCCLK/TCLK1 must be greater or equal to 3/1. 0.00 SYNCCLK/3 MHz 102 RCLK1 and TCLK1 rise/fall time — — ns 103 TXD1 active delay (from TCLK1 falling edge) 0.00 30.00 ns 104 RTS1 active/inactive delay (from TCLK1 falling edge) 0.00 30.00 ns 105 CTS1 setup time to TCLK1 rising edge 40.00 — ns 106 RXD1 setup time to RCLK1 rising edge 40.00 — ns 107 RXD1 hold time from RCLK1 rising edge 2 2 Also applies to CD and CTS hold time when they are used as an external sync signals. 0.00 — ns 108 CD1 setup time to RCLK1 rising edge 40.00 — ns |
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