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E-STE100P Fiches technique(PDF) 7 Page - STMicroelectronics

No de pièce E-STE100P
Description  10/100 FAST ETHERNET 3.3V TRANSCEIVER
Download  31 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

E-STE100P Fiches technique(HTML) 7 Page - STMicroelectronics

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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


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