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MPC852T датащи(PDF) 47 Page - Freescale Semiconductor, Inc |
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MPC852T датащи(HTML) 47 Page - Freescale Semiconductor, Inc |
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47 / 80 page ![]() MPC852T Hardware Specifications, Rev. 3.1 Freescale Semiconductor 47 CPM Electrical Characteristics 14.4 Timer AC Electrical Specifications Table 19 provides the general-purpose timer timings as shown in Figure 45. Figure 45. CPM General-Purpose Timers Timing Diagram 14.5 SCC in NMSI Mode Electrical Specifications Table 20 provides the NMSI external clock timing. Table 19. Timer Timing Num Characteristic All Frequencies Unit Min Max 61 TIN/TGATE rise and fall time 10 — ns 62 TIN/TGATE low time 1 — clk 63 TIN/TGATE high time 2 — clk 64 TIN/TGATE cycle time 3 — clk 65 CLKO low to TOUT valid 3 25 ns Table 20. NMSI External Clock Timing Num Characteristic All Frequencies Unit Min Max 100 RCLK3 and TCLK3 width high 1 1/SYNCCLK — ns 101 RCLK3 and TCLK3 width low 1/SYNCCLK +5 — ns 102 RCLK3 and TCLK3 rise/fall time — 15.00 ns 103 TXD3 active delay (from TCLK3 falling edge) 0.00 50.00 ns 104 RTS3 active/inactive delay (from TCLK3 falling edge) 0.00 50.00 ns 105 CTS3 setup time to TCLK3 rising edge 5.00 — ns CLKO TIN/TGATE (Input) TOUT (Output) 64 65 61 62 63 61 60 |
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