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ADIN2111BCPZ-R7 数据表(PDF) 49 Page - Analog Devices |
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ADIN2111BCPZ-R7 数据表(HTML) 49 Page - Analog Devices |
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49 / 125 page  Data Sheet ADIN2111 SWITCH SPI analog.com Rev. 0 | 49 of 125 ► CRSM_SFT_RST In this example, these are the PMA/PMD, PCS, autonegotiation, and Vendor Specific MMD 1 device address locations (per Table 41). Having multiple address locations for the same register makes the use of the device more complex than necessary, particularly in relation to registers that have latch low or self clear access permissions. This is an unavoidable consequence of the IEEE standard. The ADIN2111 data sheet only calls out a single recommended address location for each of these IEEE registers to simplify the operation and use of the device. In general, the registers intro- duced in the 802.3cg (10BASE-T1L) section of the standard are recommended over older (equivalent) registers. Often, registers in a vendor specific address are recommended, particularly where a register brings a number of useful IEEE register bits into a single register address. The ADIN2111 responds to register accesses to all the IEEE register address locations covered by the 10BASE-T1L standard when the start up completes after a power-on reset, hardware reset, or software reset. PHY Subsystem Registers Read Modify Write Operation All PHY subsystems register write operations must be performed as read modify write operations. If this process is not followed, the value of the register bits can inadvertently change. |
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