mpc8308 Freescale Semiconductor, Inc, mpc8308 Datasheet - Page 37

• Manufacturer Part Number: mpc8308
• Description: Mpc8308 Powerquicc Ii Pro Processor Hardware Specification
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Maximum time to
transition to a valid
electrical idle after
sending an electrical idle
ordered set
Maximum time to
transition to valid TX
specifications after leaving
an electrical idle condition
Differential return loss
Common mode return
loss
DC differential TX
impedance
Transmitter DC
impedance
Lane-to-Lane output skew
AC-coupling capacitor
Parameter
Table 34. Differential Transmitter (TX) Output Specifications (continued)
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 1
T
T
TX-IDLE-TO-DIFF-
TX-IDLE-SET-TO-I
Z
RL
L
TX-DIFF-DC
RL
Symbol
TX-SKEW
Z
DATA
TX-DIFF
TX-DC
C
DLE
TX-CM
TX
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.
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
Measured over 50 MHz to
1.25 GHz.
Measured over 50 MHz to
1.25 GHz.
TX DC Differential mode
Low Impedance
Required TX D+ as well as
D- DC Impedance during
all states
Static skew between any
two Transmitter Lanes
within a single Link
All Transmitters are
AC-coupled. The
AC-coupling is required
either within the media or
within the transmitting
component itself. An
external capacitor of
100nF is recommended.
Comments
Min
12
80
40
75
—
—
—
6
Typical
100
—
—
—
—
—
—
—
500 + 2
Max
120
200
20
20
—
—
—
UI
Units
dB
dB
nF
UI
UI
ps
Ω
Ω
PCI Express
Notes
—
—
—
—
—
—
4
4
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