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LAN9252/ML 数据表(PDF) 167 Page - Microchip Technology |
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LAN9252/ML 数据表(HTML) 167 Page - Microchip Technology |
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167 / 329 page  2015 Microchip Technology Inc. DS00001909A-page 167 LAN9252 11.2.16.18 PHY x Special Control/Status Indication Register (PHY_SPECIAL_CONTROL_STAT_IND_x) This read/write register is used to control various options of the PHY. Note 15: Register bits designated as NASR are reset when the PHY Reset is generated via the Reset Control Reg- ister (RESET_CTL). The NASR designation is only applicable when the Soft Reset (PHY_SRST) bit of the PHY x Basic Control Register (PHY_BASIC_CONTROL_x) is set. Note 16: The default value of this bit is a 1 if in 100BASE-FX mode, otherwise the default is a 0. Index (decimal): 27 Size: 16 bits Bits Description Type Default 15 Auto-MDIX Control (AMDIXCTRL) This bit is responsible for determining the source of Auto-MDIX control for Port x. 0: Port x Auto-MDIX enabled 1: Port x Auto-MDIX determined by bits 14 and 13 R/W NASR Note 15 0b 14 Auto-MDIX Enable (AMDIXEN) When the AMDIXCTRL bit of this register is set, this bit is used in conjunction with the AMDIXSTATE bit to control the Port Auto-MDIX functionality as shown in Table 11-13. Auto-MDIX is not appropriate and should not be enabled for 100BASE-FX mode. R/W NASR Note 15 0b 13 Auto-MDIX State (AMDIXSTATE) When the AMDIXCTRL bit of this register is set, this bit is used in conjunction with the AMDIXEN bit to control the Port Auto-MDIX functionality as shown in Table 11-13. R/W NASR Note 15 0b 12 RESERVED RO - 11 SQE Test Disable (SQEOFF) This bit controls the disabling of the SQE test (Heartbeat). SQE test is enabled by default. 0: SQE test enabled 1: SQE test disabled R/W NASR Note 15 0b 10:6 RESERVED RO - 5 Far End Fault Indication Enable (FEFI_EN) This bit enables Far End Fault Generation and Detection. See Section 11.2.14.1, "100BASE-FX Far End Fault Indication," on page 141 for more information. R/W Note 16 4 10Base-T Polarity State (XPOL) This bit shows the polarity state of the 10Base-T. 0: Normal Polarity 1: Reversed Polarity RO 0b 3:0 RESERVED RO - |
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