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VSC8504-02 датащи(PDF) 112 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) 112 Page - Microsemi Corporation

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Electrical Specifications
VMDS-10507 VSC8504-02 Datasheet Revision 4.2
101
Figure 45 •
Enhanced Serial LED Timing
5.2.10
JTAG Interface
This section provides the AC specifications for the JTAG interface. The specifications meet or exceed the
requirements of IEEE 1149.1-2001. The JTAG receive signal requirements are requested at the pin of
the device. The JTAG_TRST signal is asynchronous to the clock, and does not have a setup or hold time
requirement.
Pause between LED_DATA bit sequences tPAUSE
0.396
24.996
ms
LED_CLK to LED_DATA
tCO
127
ns
LED_CLK to LED_LD
tCL
256
ns
LED_LD pulse width
tLW
128
ns
LED_PULSE cycle time
tPULSE
199
201
µs
Table 121 •
JTAG Interface AC Specifications
Parameter
Symbol Minimum
Maximum
Unit Condition
TCK frequency
ƒ
10
MHz
TCK cycle time
tC
100
ns
TCK high time
tW(CH)
40
ns
TCK low time
tW(CL)
40
ns
Setup time to TCK rising
tSU
10
ns
Hold time from TCK rising
tH
10
ns
TDO valid after TCK falling tV(C)
28
ns
CL = 10 pF
TDO hold time from TCK
falling
tH(TDO)
0ns
CL =0 pF
TDO disable time(1)
1.
The pin begins to float when a 300 mV change from the actual VOH/VOL level occurs.
tDIS
30
ns
See Figure 47, page 102.
TRST time low
tW(TL)
30
ns
Table 120 •
Enhanced Serial LEDs AC Characteristics (continued)
Parameter
Symbol Minimum
Typical
Maximum
Unit
LED_CLK
LED_DATA
tco
tcyc
tpause
Bit 1
Bit X
Bit 2
Bit 2
tcl
LED_LD
tlw
tpulse
LED_PULSE
Bit 1



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