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VSC8504-02 датащи(PDF) 114 Page - Microsemi Corporation

номер детали VSC8504-02
подробное описание детали  Quad-Port 10/100/1000BASE-T PHY with Synchronous Ethernet and QSGMII/SGMII MAC
PDF  131 Pages
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производитель  MICROSEMI [Microsemi Corporation]
домашняя страница  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8504-02 датащи(HTML) 114 Page - Microsemi Corporation

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Electrical Specifications
VMDS-10507 VSC8504-02 Datasheet Revision 4.2
103
Figure 48 •
Serial Management Interface Timing
5.2.12
Reset Timing
This section contains the AC specifications that apply to device reset functionality. The signal applied to
the NRESET input must comply with the specifications listed in the following table.
MDC fall time
tF
100
tCYC × 10%(1)
MDC to MDIO
valid
tCO
10
300
ns
Time-dependant on
the value of the
external pull-up
resistor on the MDIO
pin
1.
For fCLK above 1 MHz, the minimum rise time and fall time is in relation to the frequency of the MDC clock
period. For example, if fCLK is 2 MHz, the minimum clock rise time and fall time is 50 ns.
Table 123 •
Reset Timing Specifications
Parameter
Symbol Minimum
Maximum
Unit
NRESET assertion time after power
supplies and clock stabilize
tW
2ms
Recovery time from reset inactive to
device fully active
tREC
105
ms
NRESET pulse width
tW(RL)
100
ns
Wait time between NRESET de-assert
and access of the SMI interface
tWAIT
105
ms
Table 122 •
Serial Management Interface AC Characteristics (continued)
Parameter
Symbol Minimum
Typical
Maximum
Unit Condition
tCYC
tWL
tWH
tSU
tH
tCO
Data
Data
MDIO
(read)
MDIO
(write)
MDC



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