dp83846a National Semiconductor Corporation, dp83846a Datasheet - Page 6

• Manufacturer Part Number: dp83846a
• Description: Dsphyter ? Single 10/100 Ethernet Transceiver
• Manufacturer: National Semiconductor Corporation

1.2 10 Mb/s and 100 Mb/s PMD Interface
RX_CLK
RXD[3]
RXD[2]
RXD[1]
RXD[0]
RX_ER/PAUSE_EN
RX_DV
TD+, TD-
RD-, RD+
Signal Name
Signal Name
S, O, PU
O
I
O, PU
O, PU/PD 38, 39, 40,
O
Type
Type
45
41
46
44
16, 17
10, 11
Pin #
Pin #
6
Description
RECEIVE CLOCK: Provides the 25 MHz recovered receive
clocks for 100BASE-TX mode and 2.5 MHz for 10BASE-T
nibble mode.
RECEIVE DATA: Nibble wide receive data (synchronous to
corresponding RX_CLK, 25 MHz for 100BASE-TX mode,
2.5 MHz for 10BASE-T nibble mode). Data is driven on the
falling edge of RX_CLK. RXD[2] has an internal pulldown re-
sistor. The remaining RXD pins have pullups.
RECEIVE ERROR: Asserted high to indicate that an invalid
symbol has been detected within a received packet in
100BASE-TX mode.
RECEIVE DATA VALID: Asserted high to indicate that valid
data is present on the corresponding RXD[3:0] for nibble
mode. Data is driven on the falling edge of the correspond-
ing RX_CLK.
Differential common driver transmit output. These differen-
tial outputs are configurable to either 10BASE-T or
100BASE-TX signaling.
The DP83846A will automatically configure the common
driver outputs for the proper signal type as a result of either
forced configuration or Auto-Negotiation.
Differential receive input. These differential inputs can be
configured to accept either 100BASE-TX or 10BASE-T sig-
naling.
The DP83846A will automatically configure the receive in-
puts to accept the proper signal type as a result of either
forced configuration or Auto-Negotiation.
Description
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