参数资料
型号: MPC8308VMAFDA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: RISC MICROCONTROLLER, PBGA473
封装: 19 X 19 MM, 1.39 MM HEIGHT, 0.80 MM PITCH, LEAD FREE, PLASTIC, MABGA-473
文件页数: 32/90页
文件大小: 1123K
代理商: MPC8308VMAFDA
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 2
38
Freescale Semiconductor
PCI Express
Maximum time to
transition to a valid
electrical idle after
sending an electrical idle
ordered set
TTX-IDLE-SET-TO-I
DLE
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-
DATA
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
Ω
Transmitter DC
impedance
ZTX-DC
Required TX D+ as well as
D- DC Impedance during
all states
40
Ω
Lane-to-Lane output skew
LTX-SKEW
Static skew between any
two Transmitter Lanes
within a single Link
500 + 2
UI
ps
AC coupling capacitor
CTX
All Transmitters shall be
AC coupled. The AC
coupling is required either
within the media or within
the transmitting
component itself. An
external capacitor of
100nF is recommended.
75
200
nF
Table 34. Differential Transmitter (TX) Output Specifications (continued)
Parameter
Symbol
Comments
Min
Typical
Max
Units
Notes
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