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鍨嬭櫉(h脿o)锛� MPC8545EVTAQGB
寤犲晢锛� Freescale Semiconductor
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鎻忚堪锛� MPU POWERQUICC III 783-PBGA
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绯诲垪锛� MPC85xx
铏曠悊鍣ㄩ鍨嬶細 32-浣� MPC85xx PowerQUICC III
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闆诲锛� 1.1V
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灏佽/澶栨锛� 783-BBGA锛孎(xi脿n)CBGA
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 783-FCPBGA锛�29x29锛�
鍖呰锛� 鎵樼洡
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MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9
Freescale Semiconductor
75
PCI Express
VTX-DC-CM
The TX DC
common mode
voltage
0
鈥�
3.6
V
The allowed DC common mode voltage under any
conditions. See Note 6.
ITX-SHORT
TX short circuit
current limit
鈥�
90
mA
The total current the transmitter can provide when
shorted to its ground
TTX-IDLE-MIN
Minimum time
spent in
electrical idle
50
鈥�
UI
Minimum time a transmitter must be in electrical
idle utilized by the receiver to start looking for an
electrical idle exit after successfully receiving an
electrical idle ordered set
TTX-IDLE-SET-TO-IDLE
Maximum time
to transition to a
valid electrical
idle after
sending an
electrical idle
ordered set
鈥�
20
UI
After sending an electrical idle ordered set, the
transmitter must meet all electrical idle
specifications within this time. This is considered
a debounce time for the transmitter to meet
electrical idle after transitioning from L0.
TTX-IDLE-TO-DIFF-DATA
Maximum time
to transition to
valid TX
specifications
after leaving an
electrical idle
condition
鈥�
20
UI
Maximum time to meet all TX specifications when
transitioning from electrical idle to sending
differential data. This is considered a debounce
time for the TX to meet all TX specifications after
leaving electrical idle
RLTX-DIFF
Differential
return loss
12
鈥�
dB
Measured over 50 MHz to 1.25 GHz.
See Note 4.
RLTX-CM
Common mode
return loss
6
鈥�
dB
Measured over 50 MHz to 1.25 GHz.
See Note 4.
ZTX-DIFF-DC
DC differential
TX impedance
80
100
120
TX DC differential mode low impedance
ZTX-DC
Transmitter DC
impedance
40
鈥�
Required TX D+ as well as D鈥� DC impedance
during all states
LTX-SKEW
Lane-to-lane
output skew
鈥�
500
+2UI
ps
Static skew between any two transmitter lanes
within a single Link
CTX
AC coupling
capacitor
75
鈥�
200
nF
All transmitters shall be AC coupled. The AC
coupling is required either within the media or
within the transmitting component itself. See note
8.
Table 56. Differential Transmitter (TX) Output Specifications (continued)
Symbol
Parameter
Min
Nom
Max
Unit
Comments
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