DS33Z41 Maxim Integrated Products, DS33Z41 Datasheet - Page 15
DS33Z41
Manufacturer Part Number
DS33Z41
Description
Network Controller & Processor ICs Quad Inverse-Multipl exing Ethernet Mappe
Manufacturer
Maxim Integrated Products
Datasheet
1.DS33Z41.pdf
(167 pages)
Specifications of DS33Z41
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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RX_CRS/
CRS_DV
RX_ERR
RX_CLK
TX_CLK
RX_DV
TX_EN
RXD[0]
RXD[1]
RXD[2]
RXD[3]
TXD[0]
TXD[1]
TXD[2]
TXD[3]
NAME
C11
D11
D10
PIN
E10
A10
B11
A11
B12
A8
B9
C9
D9
E9
C8
TYPE
IO
IO
O
O
I
I
I
I
Transmit Clock (MII). Timing reference for TX_EN and TXD[3:0]. The
TX_CLK frequency is 25MHz for 100Mbps operation and 2.5MHz for
10Mbps operation.
In DTE mode, this is a clock input provided by the PHY. In DCE mode,
this is an output derived from REF_CLK providing 2.5MHz (10Mbps
operation) or 25MHz (100Mbps operation).
Transmit Enable (MII):
This pin is asserted high when data TXD [3:0] is being provided by the
DS33Z41. The signal is deasserted prior to the first nibble of the next
frame. This signal is synchronous with the rising edge TX_CLK. It is
asserted with the first bit of the preamble.
Transmit Enable (RMII):
When this signal is asserted, the data on TXD [1:0] is valid. This signal
is synchronous to the REF_CLK.
Transmit Data 0 through 3(MII). TXD [3:0] is presented synchronously
with the rising edge of TX_CLK. TXD [0] is the least significant bit of the
data. When TX_EN is low the data on TXD should be ignored.
Transmit Data 0 through 1(RMII). Two bits of data TXD [1:0]
presented synchronously with the rising edge of REF_CLK.
Receive Clock (MII). Timing reference for RX_DV, RX_ERR and
RXD[3:0], which are clocked on the rising edge. RX_CLK frequency is
25MHz for 100Mbps operation and 2.5MHz for 10Mbps operation. In
DTE mode, this is a clock input provided by the PHY. In DCE mode,
this is an output derived from REF_CLK providing 2.5MHz (10Mbps
operation) or 25MHz (100Mbps operation).
Receive Data 0 through 3(MII). Four bits of received data, sampled
synchronously with the rising edge of RX_CLK. For every clock cycle,
the PHY transfers 4 bits to the DS33Z41. RXD[0] is the least significant
bit of the data. Data is not considered valid when RX_DV is low.
Receive Data 0 through 1(RMII). Two bits of received data, sampled
synchronously with REF_CLK with 100Mbps mode. Accepted when
CRS_DV is asserted. When configured for 10Mbps mode, the data is
sampled once every 10 clock periods.
Receive Data Valid (MII). This active high signal indicates valid data
from the PHY. The data RXD is ignored if RX_DV is not asserted high.
Receive Carrier Sense (MII). Should be asserted (high) when data
from the PHY (RXD[3:0) is valid. For each clock pulse 4 bits arrive from
the PHY. Bit 0 is the least significant bit. In DCE mode, connect to V
Carrier Sense/Receive Data Valid (RMII). This signal is asserted
(high) when data is valid from the PHY. For each clock pulse 2 bits
arrive from the PHY. In DCE mode, this signal must be grounded.
Receive Error (MII). Asserted by the MAC PHY for one or more
RX_CLK periods indicating that an error has occurred. Active High
indicates Receive code group is invalid. If CRS_DV is low, RX_ERR
has no effect. This is synchronous with RX_CLK. In DCE mode, this
signal must be grounded.
Receive Error (RMII). Signal is synchronous to REF_CLK.
15 of 167
FUNCTION
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