89hpes48t12 Integrated Device Technology, 89hpes48t12 Datasheet - Page 16
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89hpes48t12
Manufacturer Part Number
89hpes48t12
Description
48-lane, 12-port Pcie I/o Connectivity Switch
Manufacturer
Integrated Device Technology
Datasheet
1.89HPES48T12.pdf
(47 pages)
- Current page: 16 of 47
- Download datasheet (2Mb)
IDT 89HPES48T12 Data Sheet
1.
Minimum, Typical, and Maximum values meet the requirements under PCI Specification 1.1
JTAG
JTAG_TCK
JTAG_TMS
JTAG_TDI
JTAG_TDO
JTAG_TRST_N
1.
es from 0 to 1. Otherwise, a race may occur if JTAG_TRST_N is deasserted (going from low to high) on a rising edge of JTAG_TCK when
JTAG_TMS is low, because the TAP controller might go to either the Run-Test/Idle state or stay in the Test-Logic-Reset state.
2.
The JTAG specification, IEEE 1149.1, recommends that JTAG_TMS should be held at 1 while the signal applied at JTAG_TRST_N chang-
The values for this symbol were determined by calculation, not by testing.
Signal
GPIO (asynchronous input)
1
GPIO
GPIO[31:0]
,
1.
are asynchronous.
2.
GPIO signals must meet the setup and hold times if they are synchronous or the minimum pulse width if they
The values for this symbol were determined by calculation, not by testing.
Signal
1
Thigh_16a,
Symbol
Tpw_16d
Tper_16a
Tlow_16a
Tdz_16c
EXTCLK
Thld_16b
Tsu_16b
Tdo_16c
Symbol
Tpw_13b
2
2
Table 12 JTAG AC Timing Characteristics
Table 11 GPIO AC Timing Characteristics
Figure 5 GPIO AC Timing Waveform
JTAG_TCK falling
JTAG_TCK rising
2
Reference
Edge
Reference
none
none
Edge
None
16 of 47
Tpw_13b
Min
Min
10.0
25.0
50.0
50
2.4
1.0
—
—
Max Unit
—
Max
25.0
20
20
—
—
—
—
ns
Reference
Unit
See Figure 5.
Diagram
ns
ns
ns
ns
ns
ns
ns
Timing
Reference
See Figure 6.
Diagram
Timing
April 16, 2008
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