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MPC823 데이터시트(PDF) 64 Page - Freescale Semiconductor, Inc |
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MPC823 데이터시트(HTML) 64 Page - Freescale Semiconductor, Inc |
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64 / 70 page ![]() MPC823 ELECTRICAL SPECIFICATIONS Table 20. Serial Management Controller Timing NUM CHARACTERISTIC 25MHZ 40MHZ 50MHZ UNIT MIN MAX MIN MAX MIN MAX 150 CLK1 clock period 100 Ñ 100 Ñ 100 Ñ ns 151 CLK1 width low 50 Ñ 50 Ñ 50 Ñ ns 151A CLK1 width high 50 Ñ 50 Ñ 50 Ñ ns 152 CLK1 rise and fall times Ñ 15 Ñ 15 Ñ 15 ns 153 SMTXDx active delay (from CLK1 falling edge) 10 50 10 50 10 50 ns 154 SMRXDx/SYNC1 setup time 20 Ñ 20 Ñ 20 Ñ ns 155 SMRXDx/SYNC1 hold time 5Ñ5Ñ5Ñ ns NOTE: The ratio SyncCLK/SMCLK must be greater than or equal to 2/1. Figure 57. SMC Transparent Timing Diagram 150 NOTE: *THISDELAYISEQUALTOANINTEGERNUMBEROFÒCHARACTERLENGTHÓCLOCKS. SMCLK SMTXDX (OUTPUT) SYNC1 SMRXDX (INPUT) * 152 152 151 161a 153 155 154 154 155 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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