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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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IMX53CEC датащи(PDF) 37 Page - Freescale Semiconductor, Inc |
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IMX53CEC датащи(HTML) 37 Page - Freescale Semiconductor, Inc |
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37 / 204 page  Electrical Characteristics i.MX53xD Applications Processors for Consumer Products, Rev. 2 Freescale Semiconductor 37 4.4.1 GPIO Output Buffer Impedance Table 18 shows the GPIO output buffer impedance. 4.4.2 DDR Output Driver Average Impedance The DDR2/LVDDR2 interface fully complies with JESD79-2E DDR2 JEDEC standard release April, 2008. The DDR3 interface fully complies with JESD79-3D DDR3 JEDEC standard release April, 2008. Table 18. GPIO Output Buffer Impedance Parameter Symbol Test Conditions Min Typ Max Unit OVDD 2.775 V OVDD 1.875 V Output Driver Impedance Rpu Low Drive Strength, Ztl = 150 Ω Medium Drive Strength, Ztl = 75 Ω High Drive Strength, Ztl = 50 Ω Max Drive Strength, Ztl = 37.5 Ω 80 40 27 20 104 52 35 26 150 75 51 38 250 125 83 62 Ω Output Driver Impedance Rpd Low Drive Strength, Ztl = 150 Ω Medium Drive Strength, Ztl = 75 Ω High Drive Strength, Ztl = 50 Ω Max Drive Strength, Ztl = 37.5 Ω 64 32 21 16 88 44 30 22 134 66 44 34 243 122 81 61 Ω |
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