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C8051F54X Datasheet(PDF) 53 Page - Silicon Laboratories |
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C8051F54X Datasheet(HTML) 53 Page - Silicon Laboratories |
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53 / 276 page  C8051F54x Rev. 1.1 53 Table 6.6. Internal High-Frequency Oscillator Electrical Characteristics VDD = 1.8 to 2.75 V, –40 to +125 °C unless otherwise specified; Using factory-calibrated settings. Parameter Conditions Min Typ Max Units Oscillator Frequency IFCN = 111b; VDD > VREGMIN1 IFCN = 111b; VDD < VREGMIN1 24 – 0.5% 24 – 1.0% 242 242 24 + 0.5% 24 + 1.0% MHz Oscillator Supply Current (from VDD) Internal Oscillator On OSCICN[7:6] = 11b — 880 1300 µA Internal Oscillator Suspend OSCICN[7:6] = 00b ZTCEN = 1 Temp = 25 °C Temp = 85 °C Temp = 125 °C — 67 90 130 — Wake-up Time From Suspend OSCICN[7:6] = 00b — 1 — µs Power Supply Sensitivity Constant Temperature — 0.11 — %/V Temperature Sensitivity3 Constant Supply TC1 TC2 — — 5.0 –0.65 — — ppm/°C ppm/°C2 1. VREGMIN is the minimum output of the voltage regulator for its low setting (REG0CN: REG0MD = 0b). See Table 6.8, “Voltage Regulator Electrical Characteristics,” on page 54. 2. This is the average frequency across the operating temperature range 3. Use temperature coefficients TC1 and TC2 to calculate the new internal oscillator frequency using the following equation: f(T) = f0 x (1 + TC1 x (T - T0) + TC2 x (T - T0) 2) where f0 is the internal oscillator frequency at 25 °C and T0 is 25 °C. |
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