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VSC8221 Datasheet(PDF) 118 Page - Microsemi Corporation

No. de pieza VSC8221
Descripción Electrónicos  Single Port 10/100/1000BASE-T PHY with1.25 Gbps SerDes for SFPs/GBICs
PDF  138 Pages
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Fabricante Electrónico  MICROSEMI [Microsemi Corporation]
Página de inicio  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8221 Datasheet(HTML) 118 Page - Microsemi Corporation

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VSC8221
Data Sheet
VMDS-10106 Revision 4.1
December 2006
118 of 123
123
28 SYSTEM TIMING SPECIFICATIONS
28.1 JTAG Timing
The following specifications are valid only when the i/O power supply (VDDiOCTRL) is at either 3.3 V, ±5%, or 2.5 V, ±5%.
Figure 24. JTAG interface AC Timing
Table 53. JTAG Timing Specifications
Symbol
Min
Typ
Max
Unit
Parameter Description & Conditions
TTCK-Period
100
ns
TCK period.
TTCK-High
45
ns
TCK minimum pulse width high.
TTCK-Low
45
ns
TCK minimum pulse width low.
TTDi/TMS-Setup
10
ns
(TMS or TDi) to TCK setup time.
TTDi/TMS-Hold
10
ns
(TMS or TDi) to TCK hold time.
TTDO-Delay
15
ns
TDO delay from TCK.
TCK
TDI
TMS
T
TDI/TMS-Setup
T
TDI/TMS-Hold
T
TCK-Period
T
TCK-High
T
TCK-Low
T
TDO-Delay
TDO



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