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LAN8820I データシート(PDF) 73 Page - Microchip Technology

部品番号 LAN8820I
部品情報  RGMII 10/100/1000 Ethernet Transceiver
PDF  83 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN8820I データシート(HTML) 73 Page - Microchip Technology

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 2009-2015 Microchip Technology Inc.
DS00001871B-page 73
LAN8820/LAN8820I
5.5.6
SMI TIMING
This section specifies the SMI timing of the device. Please refer to Section 3.4, "Serial Management Interface (SMI),"
on page 20 for additional details.
FIGURE 5-9:
SMI TIMING
TABLE 5-18:
SMI TIMING VALUES
Symbol
Description
Min
Max
Units
Notes
tclkp
MDC period
400
ns
tclkh
MDC high time
160 (80%)
ns
tclkl
MDC low time
160 (80%)
ns
tval
MDIO (read from PHY) output valid from rising
edge of MDC
300
ns
tohold
MDIO (read from PHY) output hold from rising
edge of MDC
0ns
tsu
MDIO (write to PHY) setup time to rising edge
of MDC
10
ns
tihold
MDIO (write to PHY) input hold time after rising
edge of MDC
10
ns
MDC
MDIO
tclkh
tclkl
tclkp
tohold
MDIO
tsu tihold
(Data-Out)
(Data-In)
tohold
tval



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