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AM261...ZEJ 数据表(PDF) 108 Page - Texas Instruments |
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AM261...ZEJ 数据表(HTML) 108 Page - Texas Instruments |
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108 / 218 page  SAFETY_ERRORn (PWM Mode Enabled) SAFETY_ERRORn (PWM Mode Disabled) SFTY1 SFTY2 SFTY3 Internal Error Condition (Active High) Figure 6-7. SAFETY_ERRORn Timing Requirements and Switching Characteristics 6.11.4 Clock Specifications 6.11.4.1 Input Clocks / Oscillators 6.11.4.1.1 Crystal Oscillator (XTAL) Parameters PARAMETER MIN TYP MAX UNIT Fxtal Crystal Parallel Resonance Frequency (Fundamental mode oscillation only) –50ppm 25 50ppm MHz Duty Cycle Duty cycle output of XTAL 45 50 55 % CC1 Capacitance of CL1 + CPCBXI 12 24 pF CC2 Capacitance of CL2 + CPCBXO 12 24 pF Cshunt Crystal Circuit Shunt Capacitance 5 pF ESRxtal Crystal Effective Series Resistance 46 Ω 6.11.4.1.2 External Clock Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER MIN TYP MAX UNIT CPkg Shunt Capacitance of package 0.01 pF Pxtal Power dissipation 0.5 × ESR × (2 × π × Fxtal × CL × 1.8)2 W ts Startup time 1.5 ms 6.11.4.2 Clock Timing Tables and figures provided in this section define timing requirements and switching characteristics for clock signals. 6.11.4.2.1 Clock Timing Requirements NO. PARAMETER DESCRIPTION MIN MAX UNIT CLK1 tc(EXT_REFCLK) Cycle time minimum, EXT_REFCLK 10 ns CLK2 tw(EXT_REFCLK H) Pulse Duration minimum, EXT_REFCLK high E(1) × 0.45 E(1) × 0.55 ns CLK3 tw(EXT_REFCLKL ) Pulse Duration minimum, EXT_REFCLK low E(1) × 0.45 E(1) × 0.55 ns (1) E = EXT_REFCLK cycle time AM2612, AM2611, AM2611-Q1, AM2612-Q1 SPRSPA7C – SEPTEMBER 2024 – REVISED JULY 2025 www.ti.com 108 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated Product Folder Links: AM2612 AM2611 AM2611-Q1 AM2612-Q1 |
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