DP83849CVS/NOPB National Semiconductor, DP83849CVS/NOPB Datasheet - Page 70

• Manufacturer Part Number: DP83849CVS/NOPB
• Description: IC TXRX ETHERNET PHY DUAL 80TQFP
• Manufacturer: National Semiconductor
• Type: Transceiverr

Specifications of DP83849CVS/NOPB

• Number Of Drivers/receivers: 2/2
• Protocol: Ethernet
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Data Rate: 100Mbps
• Supply Voltage Range: 3V To 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 80
• Operating Temperature Range: 0°C To +70°C
• Msl: MSL 3 - 168 Hours
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Data Rate Max: 10Mbps
• For Use With: DP83849CVS-EVK - BOARD EVALUATION DP83849CVS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *DP83849CVS; *DP83849CVS/NOPB; DP83849CVS

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Bit
1:0
5
4
3
2
ELAST_BUF[1:0]
RX_OVF_STS
RX_UNF_STS
RMII_REV1_0
RMII_MODE
Bit Name
Table 36. RMII and Bypass Register (RBR), addresses 17h (Continued)
0, RO/COR
0, RO/COR
Strap, RW
Default
01, RW
0, RW
Reduced MII Mode:
0 = Standard MII Mode
1 = Reduced MII Mode
Reduced MII Revision 1.0:
0 = (RMII revision 1.2) CRS_DV will toggle at the end of a packet
to indicate deassertion of CRS.
1 = (RMII revision 1.0) CRS_DV will remain asserted until final data
is transferred. CRS_DV will not toggle at the end of a packet.
RX FIFO Over Flow Status:
0 = Normal
1 = Overflow detected
RX FIFO Under Flow Status:
0 = Normal
1 = Underflow detected
Receive Elasticity Buffer:
This field controls the Receive Elasticity Buffer which allows for fre-
quency variation tolerance between the 50MHz RMII clock and the
recovered data. See Section 3.2 for more information on Elasticity
Buffer settings in RMII mode. See Section 3.4 for more information
on Elasticity Buffer settings in SCMII mode.
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Description