EXTERNAL SIGNALS
KS8910 100/10 Mbps ETHERNET TRANSCEIVER
2-4
Preliminary Spec. ver
1.4
SIGNAL DESCRIPTIONS
Table 2-1. KS8910 Signal Descriptions
Signal
Pin Number
I/O
Description
MEDIA INDEPENDENT INTERFACE (MII) SIGNALS
The MII is the interface between the 10/100 Mbit/s Ethernet Transceiver and a Media Access Control (MAC)
device. MII is a nibble-wide interface clocked at either 2.5MHz or 25 MHz. The Transceiver side MII interface
supplies both the transmit and receive clocks.
Transmit MII Signals
The next sub-table shows the MII signals supported by the 10/100 Mbit/s Ethernet Transceiver for transmitting
data packets. For a detailed description of these signals, see the MII sections of the IEEE 802.3u documents listed
in the reference document section
Col
63
O
5T
t/s
Collision :
Asserted asynchronously with minimum delay from the start of a collision
on the medium.
Tx_clk
53
O
5T
t/s
Transmit clock :
TxD[3:0] and Tx_en are driven off the rising edge of the Tx_clk by the
MAC, and sampled by the Transceiver on the rising edge of the Tx_clk.
TxD[3:0]
62,61,60,59
I
5T
PD
Transmit data :
Transmit data is aligned on nibble boundaries. TxD[0] corresponds to the
first bit to transmit on the physical medium and is the LSB of the first byte,
followed by the fifth bit of that byte during the next clock.
Tx_en
58
I
5T
PD
Transmit enable :
Tx_en provides precise framing for the data carried on TxD[3:0]. It is active
during the clock periods that TxD[3:0] contains valid data to be transmitted,
from preamble through CRC.
Tx_er
52
I
5T
PD
Transmit coding error :
Tx_er is driven synchronously to Tx_clk and is sampled continuously by
the Transceiver. If asserted for one or more Tx_clk periods, it causes the
Transceiver to emit one or more symbols which are not part of the valid
data or delimiter set somewhere in the frame being transmitted.
Receive MII Signals
The next sub-table shows the MII signals supported by the 10/100 Mbit/s Ethernet Transceiver for receiving data
RX_CLK packets. For a detailed description of these signals, see the MII sections of the IEEE 802.3u standard
listed in the reference document section.
CrS
64
O
5T
t/s
Carrier sense :
Asserted asynchronously with minimum delay from the detection of a non-
idle medium.
Содержание KS8910
Страница 1: ...20 8910 0599 USER S MANUAL KS8910 100 10 Mbps Ethernet Transceriver PHY Preliminary ...
Страница 4: ...PRELIMINARY SPECIFICATION vi KS8910 100 10 Mbps ETHERNET CONTROLLER ...
Страница 21: ...EXTERNAL SIGNALS KS8910 100 10 Mbps ETHERNET TRANSCEIVER 2 8 Preliminary Spec ver 1 4 MEMO ...
Страница 47: ...10BASE T DIGITAL BLOCKS KS8910 100 10 Mbps ETHERNET TRANSCEIVER 5 6 Preliminary Spec ver 1 4 MEMO ...
Страница 89: ...APPLICATION NOTE KS8910 100 10 Mbps ETHERNET TRANSCEIVER 9 2 Preliminary Spec ver 1 4 MEMO ...
Страница 91: ...MECHANICAL DATA KS8910 100 10 Mbps ETHERNET TRANSCEIVER 10 2 Preliminary Spec ver 1 4 MEMO ...
Страница 99: ...A 8 APPENDIX KS8910 100 10 Mbps ETHERNET TRANSCEIVER Preliminary Spec ver 1 4 NOTES ...