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LAN9252/ML 数据表(PDF) 300 Page - Microchip Technology |
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LAN9252/ML 数据表(HTML) 300 Page - Microchip Technology |
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300 / 329 page  LAN9252 DS00001909A-page 300 2015 Microchip Technology Inc. 15.3.3 FREE RUNNING 25MHZ COUNTER REGISTER (FREE_RUN) This read-only register reflects the current value of the free-running 25MHz counter. Refer to Section 15.2, "Free-Run- ning Clock," on page 297 for additional information. Offset: 09Ch Size: 32 bits Bits Description Type Default 31:0 Free Running Counter (FR_CNT) This field reflects the current value of the free-running 32-bit counter. At reset, the counter starts at zero and is incremented by one every 25 MHz cycle. When the maximum count has been reached, the counter will rollover to zero and continue counting. Note: The free running counter can take up to 160nS to clear after a reset event. RO 00000000h |
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