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LAN9215I bảng dữ liệu(PDF) 21 Page - SMSC Corporation

tên linh kiện LAN9215I
Giải thích chi tiết về linh kiện  Highly Efficient Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
PDF  138 Pages
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nhà sản xuất  SMSC [SMSC Corporation]
Trang chủ  http://www.smsc.com
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LAN9215I bảng dữ liệu(HTML) 21 Page - SMSC Corporation

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Highly Efficient Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
Datasheet
SMSC
LAN9215i
21
Revision 1.93 (12-12-07)
DATASHEET
Note 2.2
Pins RXD[3:1] provide internal pull-down resistors to prevent these pins from floating when
unused. RXD0 (pin 75) does not provide an internal pull-down resistor. This pin must be
pulled or driven to a valid state at all times.
Note 2.3
The external SMI port is selected when SMI_SEL = 1. When SMI_SEL = 0, MDIO is tri-
stated and MDC is driven low.
Management Data
IO/External PHY
Detect
MDIO
(EXT_PHY_DET)
I/O8
(PD)
1
Management Data IO: When SMI_SEL = 1,
this pin is the MII SMI serial IO bus pin.
External PHY Detect: This pin also functions
as a strap input, which can be used to indicate
the presence of an external PHY.
See Note 2.3.
Note:
See Section 5.3.9, "HW_CFG—
Hardware Configuration Register" for
more information on SMI_SEL and
EXT_PHY_DET
Management Data
Clock
MDC
O8 (PD)
1
Management Data Clock: When SMI_SEL = 1,
this pin is the MII management data clock.
When SMI_SEL=0, this pin is driven low.
See Note 2.3.
Note:
See Section 5.3.9, "HW_CFG—
Hardware Configuration Register" for
more information on SMI_SEL.
Table 2.6 MII Interface Signals
NAME
SYMBOL
BUFFER
TYPE
NUM
PINS
DESCRIPTION



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