參數(shù)資料
型號: ICS1894KI-40LFT
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 53/53頁
文件大小: 0K
描述: PHYCEIVER LOW PWR 3.3V 40QFN
標準包裝: 1
系列: PHYceiver™
類型: PHY 收發(fā)器
規(guī)程: MII,RMII
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 40-VFQFN 裸露焊盤
供應商設備封裝: 40-VFQFPN(6x6)
包裝: 標準包裝
其它名稱: 800-2032-6
ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
IDT 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
9
ICS1894-40
REV K 022412
Receive Error (RXER)
RXER is asserted for one or more RXCLK periods to
indicate that an error (e.g. a coding error or any error that a
PHY is capable of detecting, and that may otherwise be
undetectable by the MAC sub-layer) was detected
somewhere in the frame presently being transferred from
the PHY. RXER transitions synchronously with respect to
RXC. While RXDV is de-asserted, RXER has no effect on
the MAC.
Carrier Sense (CRS)
CRS is asserted and de-asserted as follows:
In 10Mbps mode, CRS assertion is based on the
reception of valid preambles. CRS de-assertion is based
on the reception of an end-of-frame (EOF) marker.
In 100Mbps mode, CRS is asserted when a
start-of-stream delimiter, or /J/K symbol pair is detected.
CRS is deasserted when an end-of-stream delimiter, or
/T/R symbol pair is detected. Additionally, the PMA layer
de-asserts CRS if IDLE symbols are received without
/T/R.
Collision (COL)
COL is asserted in half-duplex mode whenever the
transmitter and receiver are simultaneously active on the
line. This is used to inform the MAC that a collision has
occurred during its transmission to the PHY.
COL transitions asynchronously with respect to TXCLK and
RXCLK.
Reduced MII (RMII) Data Interface
The Reduced Media Independent Interface (RMII) specifies
a low pin count Media Independent Interface (MII). It
provides a common interface between physical layer and
MAC layer devices, and has the following key
characteristics:
Supports 10Mbps and 100Mbps data rates.
Uses a single 50MHz reference clock provided by the
MAC or the system board.
Provides independent 2-bit wide (di-bit) transmit and
receive data paths.
Contains two distinct groups of signals: one for
transmission and the other for reception.
In RMII mode, a 50 MHz reference clock is connected to
REFIN(pin 30).
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