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参数资料
型号： MPC8308-KIT
厂商： Freescale Semiconductor
文件页数： 30/83页
文件大小： 0K
描述： KIT EVALUATION FOR MPC830X
标准包装： 1
系列： PowerQUICC II™ PRO
类型： MPU
适用于相关产品： MPC8308
所含物品： 板，线缆，CD，电源
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 3
36
Freescale Semiconductor
PCI Express
Absolute delta of DC
common mode voltage
during L0 and electrical idle
VTX-CM-DC- ACTIVE-
IDLE-DELTA
|VTX-CM-DC (during L0) - VTX-CM-Idle-DC
(During Electrical Idle)|<=100 mV
VTX-CM-DC = DC(avg) of |VTX-D+ +
VTX-D-|/2 [L0]
VTX-CM-Idle-DC = DC(avg) of |VTX-D+ +
VTX-D-|/2 [Electrical Idle]
0
—
100
mV
2
Absolute delta of DC
common mode between D+
and D–
VTX-CM-DC-LINE-
DELTA
|VTX-CM-DC-D+ - VTX-CM-DC-D-| <= 25 mV
VTX-CM-DC-D+ = DC(avg) of |VTX-D+|
VTX-CM-DC-D- = DC(avg) of |VTX-D-|
0—
25
mV
2
Electrical idle differential
peak output voltage
VTX-IDLE-DIFFp
VPEEIDPTX = |VTX-IDLE-D+ -VTX-IDLE-D-|
<= 20 mV
0—
20
mV
2
Amount of voltage change
allowed during receiver
detection
VTX-RCV-DETECT The total amount of voltage change that
a transmitter can apply to sense whether
a low impedance Receiver is present.
—600
—
mV
6
TX DC common mode
voltage
VTX-DC-CM
The allowed DC Common Mode voltage
under any conditions.
—3.6
—
V
6
TX short circuit current limit
ITX-SHORT
The total current the Transmitter can
provide when shorted to its ground
——
90
mA
—
Minimum time spent in
electrical idle
TTX-IDLE-MIN
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
50
—
UI
—
Maximum time to transition
to a valid electrical idle after
sending an electrical idle
ordered set
TTX-IDLE-SET-TO-ID
LE
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.
——
20
UI
—
Maximum time to transition
to valid TX specifications
after leaving an electrical
idle condition
TTX-IDLE-TO-DIFF-D
ATA
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
——
20
UI
—
Differential return loss
RLTX-DIFF
Measured over 50 MHz to 1.25 GHz.
12
—
dB
4
Common mode return loss
RLTX-CM
Measured over 50 MHz to 1.25 GHz.
6
—
dB
4
DC differential TX
impedance
ZTX-DIFF-DC
TX DC Differential mode Low
Impedance
80
100
120
—
Transmitter DC impedance
ZTX-DC
Required TX D+ as well as D- DC
Impedance during all states
40
—
—
Lane-to-Lane output skew
LTX-SKEW
Static skew between any two Transmitter
Lanes within a single Link
—
500 + 2
UI
ps
—
Table 34. Differential Transmitter (TX) Output Specifications (continued)
Parameter
Symbol
Comments
Min
Typical
Max
Units Note
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