RTL8201L 데이터 시트보기 (PDF) - Realtek Semiconductor
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RTL8201L Datasheet PDF : 26 Pages
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RTL8201(L)
5. Pin Description
5.1 100 Mbps MII & PCS Interface
Symbol
TXC
TXEN
TXD[3:0]
RXC
COL
CRS
RXDV
RXD[3:0]
RXER
MDC
MDIO
Type
O
I
I
O
O
I/O
O
O
O
I
I/O
Pin(s) No.
7
2
3, 4, 5, 6
16
1
23
22
18, 19, 20, 21
24
25
26
Description
Transmit Clock: This pin provides a continuous clock as a timing reference
for TXD[3:0] and TXEN.
Transmit Enable: The input signal indicates the presence of a valid nibble
data on TXD[3:0].
Transmit Data: MAC will source TXD[0..3] synchronous with TXC when
TXEN is asserted.
Receive Clock: This pin provides a continuous clock reference for RXDV
and RXD[0..3] signals. RXC is 25MHz in the 100Mbps mode and 2.5Mhz in
the 10Mbps mode.
Collision Detected: COL is asserted high when a collision is detected on the media.
Carrier Sense: This pin’s signal is asserted high if the media is not in IDEL state.
Receive Data Valid: This pin’s signal is asserted high when received data is
present on the RXD[3:0] lines; the signal is deasserted at the end of the
packet. The signal is valid on the rising of the RXC.
Receive Data: These are the four parallel receive data lines aligned on the
nibble boundaries driven synchronously to the RXC for reception by the
external physical unit (PHY).
Receive error: if any 5B decode error occurred such as invalid J/K, T/R,
invalid symbol, this pin will go high
Management Data Clock: This pin provides a clock synchronous to MDIO,
which may be asynchronous to the transmit TXC and receive RXC clocks.
Management Data Input/Output: This pin provides the bi-directional
signal used to transfer management information.
5.2 Serial Network Interface (SNI)
10Mbps only
Symbol
COL
RXD0
CRS
RXC
TXD0
TXC
TXEN
Type
O
O
O
O
I
O
I
Pin(s) No.
1
21
23
16
6
7
2
Description
Collision Detect
Received Serial Data
Carrier Sense
Receive Clock: Resolved from received data
Transmit Serial Data
Transmit Clock: Generate by PHY
Transmit Enable: For MAC to indicate transmit operation
5.3 Clock Interface
Symbol
X2
X1
Type
O
I
Pin(s) No.
47
46
Description
25Mhz Crystal Output: This pin provides the 25MHz crystal output.
25Mhz Crystal Input: This pin provides the 25MHz crystal input.
2002-01-18
5
Rev.1.04
Tel: +49(0)234-9351135 · Fax: +49(0)234-9351137 E-MAIL: info@cornelius-consult.de
http://www.cornelius-consult.de
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