DP83849CVS/NOPB National Semiconductor, DP83849CVS/NOPB Datasheet - Page 61

• 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

7.2 Extended Registers - Page 0
7.2.1 False Carrier Sense Counter Register (FCSCR)
This counter provides information required to implement the “False Carriers” attribute within the MAU managed object
class of Clause 30 of the IEEE 802.3u specification.
7.2.2 Receiver Error Counter Register (RECR)
This counter provides information required to implement the “Symbol Error During Carrier” attribute within the PHY man-
aged object class of Clause 30 of the IEEE 802.3u specification.
7.2.3 100 Mb/s PCS Configuration and Status Register (PCSR)
This register contains control and status information for the 100BASE Physical Coding Sublayer.
15:12
15:8
15:8
Bit
7:0
Bit
7:0
Bit
11
10
9
SD FORCE PMA
RXERCNT[7:0]
FCSCNT[7:0]
RESERVED
RESERVED
RESERVED
Table 35. 100 Mb/s PCS Configuration and Status Register (PCSR), address 16h
FREE_CLK
Bit Name
Bit Name
Bit Name
TQ_EN
Table 33. False Carrier Sense Counter Register (FCSCR), address 14h
Table 34. Receiver Error Counter Register (RECR), address 15h
0, RO/COR
0, RO/COR
<00>, RO
Default
Default
Default
0,
0, RW
0
0, RO
0, RO
, RW
RW
RESERVED: Writes ignored, Read as 0
False Carrier Event Counter:
This 8-bit counter increments on every false carrier event. This
counter sticks when it reaches its max count (FFh).
RESERVED: Writes ignored, Read as 0
RX_ER Counter:
When a valid carrier is present and there is at least one occurrence
of an invalid data symbol, this 8-bit counter increments for each re-
ceive error detected. This event can increment only once per valid
carrier event. If a collision is present, the attribute will not incre-
ment. The counter sticks when it reaches its max count.
RESERVED: Writes ignored, Read as 0.
Receive Clock:
1 = RX_CLK is free-running
0 = RX_CLK phase adjusted based on alignment
100Mbs True Quiet Mode Enable:
1 = Transmit True Quiet Mode.
0 = Normal Transmit Mode.
Signal Detect Force PMA:
1 = Forces Signal Detection in PMA.
0 = Normal SD operation.
61
Description
Description
Description
www.national.com