DP83848VYB National Semiconductor, DP83848VYB Datasheet - Page 51

• Manufacturer Part Number: DP83848VYB
• Description: TRANSCEIVER, ENET PHY, 10/100, 48LQFP
• Manufacturer: National Semiconductor

Specifications of DP83848VYB

• Data Rate: 100Mbps
• No. Of Ports: 1
• Ethernet Type: IEEE 802.3u
• Supply Current: 92mA
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C To +105°C
• Digital Ic Case Style: LQFP
• No.: RoHS Compliant
• Interface Type: MII Serial, RMII
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Not Compliant

14:12
11:9
Bit
4:0
Bit
15
6
5
7.2.10 10 Base-T Status/Control Register (10BTSCR)
This register is used for control and status for 10BASE-T device operation.
8
7
6
5
LOOPBACK_10_DIS
FORCE_LINK_10
PHYADDR[4:0]
LED_CNFG[1]
LED_CNFG[0]
10BT_SERIAL
RESERVED
RESERVED
Bit Name
SQUELCH
Bit Name
LP_DIS
TABLE 30. 10Base-T Status/Control Register (10BTSCR), address 1Ah
Strap, RW
Strap, RW
Default
0, RW
Strap, RW
100, RW
Default
0, RW
0, RW
0, RW
0, RW
0, RW
LED Configuration
In Mode 1, LEDs are configured as follows:
LED_LINK = ON for Good Link, OFF for No Link
LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s
LED_ACT/LED_COL = ON for Activity, OFF for No Activity
In Mode 2, LEDs are configured as follows:
LED_LINK = ON for good Link, BLINK for Activity
LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s
LED_ACT/LED_COL = ON for Collision, OFF for No Collision
Full Duplex, OFF for Half Duplex
In Mode 3, LEDs are configured as follows:
LED_LINK = ON for Good Link, BLINK for Activity
LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s
LED_ACT/LED_COL = ON for Full Duplex, OFF for Half Duplex
PHY Address: PHY address for port.
LED_CNFG[1]
10Base-T Serial Mode (SNI)
1 = Enables 10Base-T Serial Mode.
0 = Normal Operation.
Places 10 Mb/s transmit and receive functions in Serial Network Interface (SNI)
Mode of operation. Has no effect on 100 Mb/s operation.
RESERVED: Must be zero.
Squelch Configuration:
Used to set the Squelch ON threshold for the receiver.
Default Squelch ON is 330mV peak.
10Base-T Loopback Disable:
In half-duplex mode, default 10BASE-T operation loops Transmit data to the
Receive data in addition to transmitting the data on the physical medium. This
is for consistency with earlier 10BASE2 and 10BASE5 implementations which
used a shared medium. Setting this bit disables the loopback function.
This bit does not affect loopback due to setting BMCR[14].
Normal Link Pulse Disable:
1 = Transmission of NLPs is disabled.
0 = Transmission of NLPs is enabled.
Force 10Mb Good Link:
1 = Forced Good 10Mb Link.
0 = Normal Link Status.
RESERVED: Must be zero.
Don't care
0
1
51
LED_CNFG[0]
1
0
0
Description
Description
Mode Description
Mode 1
Mode 2
Mode 3
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