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STE100P 数据表(PDF) 7 Page - STMicroelectronics

部件名 STE100P
功能描述  10/100 FAST ETHERNET 3.3V TRANSCEIVER
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STE100P 数据表(HTML) 7 Page - STMicroelectronics

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STE100P
5.0 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 Hardware Control
Interface provides initial values for the MDIO registers, and then passes control to the MDIO Interface. Individ-
ual chip addressing via the LED/PAD pins allows multiple STE100P devices to share the MII interface. Table 2
shows how to set up the desired operating configurations using the Hardware Control Interface.
Table 2. 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 net-
work 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. Conversely, 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 11.
See Section 7 for more detailed descriptions of device operation.
6.0 REGISTERS AND DESCRIPTORS DESCRIPTION
There are 11 registers with 16 bits each supported for STE100P. This includes 7 basic registers which are de-
fined according to the clause 22 “Reconciliation Sub-layer and Media Independent Interface” and clause 28
“Physical Layer link signaling for 10 Mb/s and 100 Mb/s Auto-Negotiation on twisted pair” of IEEE802.3u stan-
dard.
There are 11 registers with 16 bits each supported for the STE100P. These include 7 basic registers which are
defined according to the clause 22 “Reconciliation Sublayer and Media Independent Interface” and clause 28
“Physical Layer link signaling for 10 Mb/s and 100 Mb/s Auto-Negotiation on twisted pair” of IEEE802.3u stan-
dard.
In addition, there are 4 special registers for advanced chip control and status information.
Desired
Configura tion
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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