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E-STE100P Fiches technique(PDF) 7 Page - STMicroelectronics |
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E-STE100P Fiches technique(HTML) 7 Page - STMicroelectronics |
7 / 31 page 7/31 STE100P 5 HARDWARE CONTROL INTERFACE 5.1 Operating Configurations The Hardware Control Interface consists of the MF<4:0>, CFG <1:0> and FDE input pins as well as the LED/PAD pins. This interface is used to configure operating characteristics of the STE100P. The Hard- ware Control Interface provides initial values for the MDIO registers, and then passes control to the MDIO Interface. Individual chip addressing via the LED/PAD pins allows multiple STE100P devices to share the MII interface. Table 3 shows how to set up the desired operating configurations using the Hardware Con- trol Interface. Table 3. Operating Configurations / Auto-Negotiation Enabled Note: If pin 5, MF0 = 0, or ANE (pin MF0 / PR0:12) = 0 (Auto-Negotiation disabled), then PR4 bits 5-8 will contain the default value indicated in the table describing register PR4. 5.2 LED / PHY Address Interface The LED output pins can be used to drive LED’s directly, or can be used to provide status information to a network management device. The active state of each LED output driver is dependent on the logic level sampled by the corresponding PHY address input upon power-up/reset. For example, if a given PAD input is resistively pulled low then the corresponding LED output will be configured as an active high driver. Con- versely, if a given PAD input is resistively pulled high then the corresponding LED output will be configured as an active low driver. These outputs are standard CMOS drivers and not open-drain. The STE100P PAD[4:0] inputs provide up to 32 unique PHY address options. An address selection of all zeros (00000) will result in a PHY isolation condition as a result of power-on/reset, as documented for PR0 bit 10. (See Section 7 for more detailed descriptions of device operation.) Desired Configuration Input Value PR4 Register Bits Affected CFG0 CFG1 FDE [8] TXF [7] TXH [6] 10F [5] 10H Advertise All 1 1 1 1 1 1 1 Advertise 100 HD 1 0 0 0 1 0 0 Advertise 100 HD/FD 1 0 1 1 1 0 0 Advertise 10 HD 0 1 0 0 0 0 1 Advertise 10 HD/FD 0 1 1 0 0 1 1 Advertise 10/100 HD 1 1 0 0 1 0 1 |
Numéro de pièce similaire - E-STE100P |
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Description similaire - E-STE100P |
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